A Certain Scientific Railgun S

A Certain Scientific Railgun S is the second season of the A Certain Scientific Railgun television anime series produced by J.C.Staff and directed by Tatsuyuki Nagai, based on the manga of the same name, which in itself is a spin-off of Kazuma Kamachi's A Certain Magical Index series. The anime series is set in Academy City before and during the events of A Certain Magical Index, in which the plot focuses on Mikoto Misaka, an electromaster who is the third strongest esper in Academy City, along with her friends: Kuroko Shirai, a teleporter and Mikoto's roommate; Kazari Uiharu, Kuroko's partner in Judgment, the city's public safety committee; and Ruiko Saten, Kazari's friend and classmate.

A Certain Scientific Railgun
Season 2
Country of origin	Japan
No. of episodes	24
Release
Original network	Tokyo MX
Original release	April 12 – September 27, 2013
Season chronology

The season aired in Japan between April 12, 2013 and September 27, 2013 and was simulcast by Funimation, who released the series on DVD between July and August 2014.[1][2] Another Visual Book containing another bonus episode was released on March 27, 2014.

The second season uses six pieces of theme music, two opening theme and four ending themes. For the first sixteen episodes, the opening theme is "Sisters' Noise" by fripSide whilst the main ending theme is "Grow Slowly" by Yuka Iguchi. The ending theme for episodes 11 and 14 is "stand still" by Iguchi. From episode seventeen onwards, the opening theme is "Eternal Reality" by fripSide whilst the ending theme is "Links" (リンクス, Rinkusu) by Sachika Misawa. The ending theme for episode 23 is "Infinia" (インフィニア) by Sachika Misawa.

Episode list

No. overall	No. in season	Title	Original airdate
25	1	"Railgun" Transcription: "Rērugan" (Japanese: 超電磁砲（レールガン）)	April 12, 2013
Following an uncomfortable run in with Misaki Shokuhō, another Level 5 esper from Tokiwadai Middle School, Mikoto Misaka meets up with Kuroko Shirai, Kazari Uiharu, Ruiko Saten and Erii Haruue as they all pay a visit to Banri Edasaki in the hospital. While Erii rekindles with Banri, who is undergoing physiotherapy, Mikoto tries to come up with a way to surprise Banri with a present everyone bought for her, only to realize she had left the bag containing the present in Banri's ward. Just then, a criminal patient that was under watch by the Anti-Skills is broken free by some of his companions and takes Erii as a hostage. Upon learning of the situation from Aiho Yomikawa and Tsuzuri Tessō, Mikoto heads to the rooftop to try and prevent the culprits escaping via helicopter. They throw Erii off the side of the building in order to break free, but she is saved thanks to Ruiko and Kuroko. Learning that her bag is onboard the fleeing helicopter, Mikoto has Kuroko teleport her to the skies where she destroys the helicopter with her railgun, with Kuroko safely apprehending the culprits. With the incident dealt with, Banri finally opens her present from everyone, which is a Sakugawa Middle School uniform for her to wear once she recovers.
26	2	"Critical" Transcription: "Kuritikaru" (Japanese: 寿命中断（クリティカル）)	April 19, 2013
Mikoto recalls in a dream of how, when she was younger, she was approached by scientists wanting to use her DNA map to help cure Duchenne muscular dystrophy. The next morning, Kuroko tries to take Mikoto through an alleyway to get to the mall, but they encounter a few people passing by. They discover this is due to someone hiding envelopes containing cash cards within the alleyways, piquing people's curiosity to search for them. After running into Ruiko, who is also on the hunt for the money cards, Mikoto overhears some Skill-Outs who have managed to locate the source of the envelopes and decides to follow them. Meanwhile, Ruiko grows curious as she had allegedly seen Mikoto at the mall, despite Mikoto never actually getting there, with Mii Konori explaining to Kazari about a rumor of there being clones of a Level 5 esper. The Skill-Outs eventually trace the envelopes back to a Nagatenjōki Academy student, demanding she hand over the other envelopes. Things get tense, however, when it appears the Skill-Outs are gradually getting killed off by the girl, who claims to be able to freely kill anyone she has touched. When Mikoto arrives on the scene, the girl, who had simply knocked out all the Skill-Outs using anesthetic and clever acting skills, recognizes her as the "original".
27	3	"Project Radio Noise" Transcription: "Redio Noizu Keikaku" (Japanese: 超電磁砲量産計画（レディオノイズけいかく）)	April 26, 2013
Mikoto is reminded of rumors about there being a clone of her and attempts to question the girl, who was distributing the envelopes in order to fill the alleyways that security cameras cannot reach with human eyes. However, the girl leaves after inadvertently setting the building on fire whilst burning the evidence, simply stating Mikoto is better off not knowing as she would be unable to stop what was happening with her power. After saving the Skill-Outs, Mikoto looks up for information on the girl, whose name is revealed to be Shinobu Nunotaba, who actually worked at the same medical facility where she had given the scientists her DNA map years ago. Mikoto infiltrates the facility and comes across a room that is separate from the rest of the building's network. Mikoto hacks into database there and is shocked to learn that the scientists tricked her into giving them her DNA map in order to create clones called "Sisters", known as Project Radio Noise. However, the project was cancelled when the supercomputer, Tree Diagram, deduced that the clones would not come close to matching Mikoto's level of power. Believing there were not any clones of her after all, Mikoto feels relieved and leaves the facility, unaware of a clone arriving later to delete the database.
28	4	"Sisters" Transcription: "Shisutāzu" (Japanese: 妹達（シスターズ）)	May 3, 2013
Three months earlier, in an unknown facility, a pair of women scientists, later recognized as Yumi Kusakabe and Eiga Kanmi, had mentored the birth of a clone of Mikoto, labelled Misaka 9982, installing memory functions via a capsule-like machine called Testament. Back in the present, Mikoto, who is feeling cheerful with the clone rumors being seemingly debunked, goes shopping with Kuroko and the others at the mall, helping Kazari and Erii buy a rice cooker whilst also picking out things for an upcoming school trip. The next day, as Mikoto ends up having nothing to do, some young children, including the girl whose bag she previously found, pick up on her boredom and have her play with them. Noticing one of the kids wearing a Gekota badge, Mikoto frantically goes through a whole bunch of capsule vendors in order to win one for herself. As the day comes to an end, Mikoto suddenly senses a power identical to her own and, upon chasing after its source, comes across Misaka 9982.
29	5	"Project Level 6 Shift" Transcription: "Reberu Shikkusu Shifuto Keikaku" (Japanese: 絶対能力進化計画（レベル6 シフト けいかく）)	May 10, 2013
After unwillingly helping her rescue a kitten from a tree, Mikoto tries to question Misaka 9982, but is unable to learn much due to being unable to decipher a codeword. She instead decides to follow her around in case she returns to her base of operations, where they end up doing some surprisingly sisterly activities. Later that evening, as Misaka 9982 points out that she is not returning to her point of origin, Mikoto takes her leave after inadvertently giving her the Gekota badge she won earlier. After receiving some help from Kazari in deciphering the codeword she was told about, Mikoto is horrified to learn of Project Level 6 Shift, in which 20,000 Sisters from Project Radio Noise are to be killed in 20,000 battles in order to evolve Academy City's most powerful Level 5 esper, Accelerator, into a Level 6 esper. Whilst learning of this, Misaka 9982 engages in her assigned battle with the aforementioned Accelerator, finding herself helpless against his reflective abilities. Fleeing to a railway yard, she attempts a sneak attack on Accelerator using a planted mine, only for him to survive and tear off her leg. Mikoto arrives on the scene, only to look in horror as Accelerator crushes Misaka 9982 to death with a train, sending Mikoto into a furious rage.
30	6	"I... Can See All of You" Transcription: "Atashi... Minna no Koto Miete Irukara" (Japanese: あたし…みんなのこと見えているから)	May 17, 2013
Mikoto unleashes her anger at Accelerator, who quickly deduces she is the original, and becomes further enraged upon seeing Misaka 9982's torn leg and hearing Accelerator's selfish reasons for participating in the experiment. However, even her most powerful attacks are simply reflected back at her. Just then, the fight is halted by the arrival of dozens of other Sisters, who request that Accelerator stop fighting Mikoto to avoid throwing off the experiment's calculations. As Accelerator takes his leave, Mikoto feels no comfort in hearing the Sisters acknowledge themselves as nothing more than guinea pigs. After a restless night, Mikoto is approached by Shinobu, who explains why she chose to oppose the experiment. Having been called back from Project Radio Noise to assist in Project Level 6 Shift, Shinobu got to see the sensitive side of one of the Sisters and became unable to see them as anything other than human. Upon hearing this, Mikoto takes it upon herself to destroy the facilities involved in the experiment, keeping it a secret from Kuroko and the others.
31	7	"I... I Want To Be of Help To You, Sister Dearest" Transcription: "Onee-sama no Chikara ni Naritai desu no" (Japanese: お姉さまの力になりたいですの)	May 24, 2013
Eliminating as many facilities involved with Project Level 6 Shift through electronic warfare before she is shut out from their communication lines, Mikoto starts spending several nights attacking the other facilities directly. Kuroko, who has grown concerned about Mikoto constantly being out at night, comes across a group of girls who are looking for a "lucky card", based on an urban legend spawned from the cash card incident. The next day, Kuroko encounters one of the girls, Minori, saving her from being hit by a car during her search, hearing how she wanted to find a lucky item for her friend who is moving away. After pointing out cash cards would be out of the question, since they would need to be turned into Judgment, Konori suggests that they instead search for a four-leaf clover. During their search, Kazari and Ruiko give Kuroko some assurance that Mikoto, along with themselves, appreciate her efforts. Both Kuroko and Minori find four-leaved clovers, with Kuroko keeping hers and resolving to always wait for Mikoto. Meanwhile, as Mikoto manages to dwindle down the remaining facilities to two, Kites Knockraven, a higher up in the project, prepare a counter-plan.
32	8	"ITEM" Transcription: "Aitemu" (Japanese: ITEM（アイテム）)	May 31, 2013
With only two facilities remaining, Knockraven calls upon the services of the mercenary team ITEM. As Mikoto infiltrates one of these facilities, she finds herself against one of its members, Frenda Seivelun, who causes trouble for her using flammable tape and stuffed dolls containing bombs. Meanwhile, Shinobu arrives at the other remaining facility, where they are attempting to transport the data whilst the other facility is being attacked. Mikoto chases down Frenda who, after a series of failed attacks, fills the room up with nitrogen, bluffing that it is an explosive gas to prevent Mikoto from using her electricity against her. However, Mikoto, refusing to simply give up and be killed, manages to fight back against Frenda, leading to her bluff becoming exposed. As Mikoto tries to interrogate Frenda, who is unable to respond due to being shocked by her, she is suddenly attacked by ITEM's leader and the fourth ranked Level 5 esper, Shizuri Mugino.
33	9	"AIM Stalker" Transcription: "Ei Ai Emu Sutōkā" (Japanese: 能力追跡（AIMストーカー）)	June 7, 2013
Mikoto attempts to escape from Shizuri's attacks, which proves difficult due to ITEM's third member, Rikō Takitsubo, using her AIM Stalker ability to help Shizuri and Frenda home their attacks on her position. Meanwhile, Shinobu, who felt Mikoto should not have to carry her burden alone, sneaks into the basement of her facility where the incubated Sisters are being held, hoping to install emotions into all of the remaining Sisters via the Misaka Network in the hopes that it may move the organizers to suspend the experiments. However, she is apprehended by ITEM's fourth member, Saiai Kinuhata, who was guarding the facility in case a second party was involved in the attacks. Shinobu manages to get the program installing, but it is suddenly blocked by an unforeseen error code. Shinobu fires a gun at Saiai to save herself, but her attack fails due to Saiai's Offense Armor ability and she is taken into custody. Back at the other facility, a weakened Mikoto is forced to use her ability to deflect Shizuri's Meltdowner attack, making her realize who the intruder's identity is. Learning of this, Shizuri decides to send the injured Frenda and exhausted Rikō away so she can settle things with Mikoto herself.
34	10	"Meltdowner" Transcription: "Merutodaunā" (Japanese: 原子崩し（メルトダウナー）)	June 14, 2013
Coming face to face with Shizuri, Mikoto uses some of the explosive dolls that Frenda inadvertently left behind to compensate for her weakened powers. Shizuri fights off these dolls by using silicon shards cards to divide her lasers, but Mikoto manages to knock her out with one of the remaining dolls. After finding and destroying the facility's data bank, Mikoto finds herself on the run from an angered Shizuri. Fleeing to a bridge, Mikoto manages to get the best of Shizuri by using Frenda's flammable tape to collapse the walkway underneath her and cause her to fall down. As Mikoto makes her escape, Shizuri manages to learn about Project Level 6 Shift from one of the staff and decides it would be more amusing to let Mikoto suffer. The next day, Mikoto investigates the remaining facility, only to find it completely abandoned, allegedly having gone bankrupt. Believing the experiments to finally be over, Mikoto comes across Tōma Kamijō by the vending machines.
35	11	"The Vending Machine" Transcription: "Jidō Hanbaiki" (Japanese: 自動販売機)	June 21, 2013
Mikoto runs into Tōma, who appears to have trouble remembering who she is, and vandalizes a vending machine to spit out drinks to compensate for some money it had stolen from him. Kuroko arrives on the scene and, despite not being pleased over the presence of a supposed "boyfriend", feels relieved that Mikoto appears to be back to her cheerful self and takes her leave. However, Mikoto's joy is short-lived when another Sister, Misaka 10031, appears before her, telling her in private that the experiments are still ongoing. Horrified to learn more Sisters have died because of her, Mikoto ends up yelling at Misaka 10031 for reminding her of Misaka 9982. Later discovering that countless other facilities have picked up the experiment, Mikoto comes to realize that her enemy is Academy City itself. Meanwhile, Accelerator recalls how he was first approached about Project Level 6 Shift. Deciding that she will need to do something drastic in order to stop the experiments, Mikoto feels relieved that Kuroko would still perform her duty as a Judgment officer should she be labelled a criminal for doing so.
36	12	"Tree Diagram" Transcription: "Tsurī Daiaguramu" (Japanese: 樹形図の設計者（ツリーダイアグラム）)	June 28, 2013
Mikoto resolves to hack into and destroy the Tree Diagram, the supercomputer responsible for the experiment's calculations, in the hope she may be able to stop them. Meanwhile, Tōma encounters Misaka 10032, who coerces him into helping her look after an abandoned kitten she had found. As Tōma goes into a bookstore to look for a book to help him with his own cat, Misaka 10032 goes off to observe Accelerator as he begins his scheduled battle with Misaka 10031. Arriving at Tree Diagram's control center, hoping to hack into Tree Diagram to order a halt to the experiment, Mikoto is confused to find it not only heavily low on security, but completely abandoned as well. Hacking into the system, she is horrified to learn the truth, in that Tree Diagram had been destroyed for months, with the experiments continuing regardless.
37	13	"Accelerator" Transcription: "Akuserarēta" (Japanese: 一方通行（アクセラレータ）)	July 5, 2013
Mikoto falls in despair, realizing that with Tree Diagram destroyed, she has no way of stopping the experiments. She tries to cling onto her cause by mercilessly destroying another facility, but loses all hope when she sees a live feed of Misaka 10031 being killed by Accelerator. As Accelerator reminisces about his first experiment and his first time killing a Sister, Tōma discovers Misaka 10031's corpse and calls the Anti-Skills to investigate it, only to find it gone when they arrive, with no evidence it ever occurred. After the Anti-Skills leave, Misaka 10032 appears before Tōma, who comes to learn the true nature of the Sisters. Upon learning this, Tōma heads for the Tokiwadai dorms to try to get some answers from Mikoto, who at the same time is contemplating her last resort.
38	14	"The Promise" Transcription: "Yakusoku" (Japanese: 約束)	July 12, 2013
Tōma arrives at the Tokiwadai dorms, where he is reluctantly greeted by Kuroko, who decides to let him wait for Mikoto return. When the Tokiwadai Dorm Supervisor comes by for an inspection, Kuroko is forced to hide Tōma under Mikoto's bed due to his Imagine Breaker negating her teleportation. There, he finds the details concerning Project Level 6 Shift stuffed inside a teddy bear, learning that Misaka 10032's experiment is next. Tōma follows a trail of windmills to a bridge where he eventually finds Mikoto and confronts her about the experiments. With all her other efforts failed, Mikoto feels convinced that letting herself be killed by Accelerator is the only way to stop the experiments, proving she does not live up to Tree Diagram's expectations. However, Tōma, feeling her way will not save anyone, decides to stand in her way, refusing to fight back or even defend himself from Mikoto's lightning. Mikoto's emotions soon build up into a large shock wave that Tōma takes the full brunt of, helping her to see his resolve. After regaining consciousnesses and being greeted by a tearful Mikoto, Tōma comes up with the idea that if he as a Level 0 can defeat the Level 5 Accelerator in a fight and prove him to be actually weak, the entire basis for the experiments would fall apart. Despite Mikoto's objection, Tōma heads off to where Misaka 10032's experiment is being held.
39	15	"Tōma Kamijō" Transcription: "Kamijō Tōma" (Japanese: 最弱（かみじょうとうま）)	July 19, 2013
Despite his injuries, Tōma arrives at the site where Accelerator and Misaka 10032 are fighting and states his firm desire to rescue the Sister, saying that even if she is a clone, there is only one of her in the entire world. As their fight begins, Tōma initially struggles against Accelerator as he launches projectiles at him and sets off a dust explosion. However, Accelerator is shocked when Tōma is able to punch him with his right hand without being affected by his ability, also coming as a surprise to Mikoto, who had also rushed to the scene. Angered, Accelerator starts using his ability to manipulate the wind, creating a huge hurricane that deals a lot of damage to Tōma. Mikoto attempts to go with her original plan in order to save Tōma, only to realize it would be futile upon witnessing Accelerator using his power to create a plasma storm that would wipe out everything in the area. Realizing what can be done to stop it, Mikoto goes over to Misaka 10032 and begs for her help in protecting Tōma's dream. Moved by these words, Misaka 10032 uses the Misaka Network to command the other Sisters in Academy City to manipulate the city's windmills with their electricity, affecting the wind and disrupting Accelerator's calculations, preventing him from stabilizing the plasma. As Mikoto prepares to stand off against Accelerator once more, Tōma gathers the strength to stand up.
40	16	"Sisterhood" Transcription: "Shimai" (Japanese: 姉妹)	July 26, 2013
Accelerator demands to know why Mikoto is protecting Misaka 10032, to which she responds that it is simply because she is her sister. Before Accelerator can attempt to kill them, Tōma manages to regain his footing and uses the remainder of his strength to knock Accelerator out with one final punch. As he loses consciousness, Accelerator comes to the realization that the reason he wanted to become a Level 6 in the first place was so that he would not have to hurt anyone anymore. After the experiments are cancelled as a result of Accelerator's defeat, Mikoto goes to the hospital to visit Tōma, who assures her that even though many Sisters died, it was thanks to her that they got to be born in the first place. Afterwards, Mikoto takes a walk with Misaka 10032, where they play with another pair of sisters at the playground and think about the future that lies ahead. The next day, Mikoto borrows Ruiko's kitchen to make some handmade cookies for Tōma as thanks for his help. Despite not getting an opportunity to give them to him, Mikoto feels pleased when he finally calls her by her proper name.
41	17	"Study Group" Transcription: "Benkyō-kai" (Japanese: 勉強会)	August 2, 2013
When asked by the Dorm Supervisor to explain her absences, Mikoto bluffs that she was having study sessions with her friends. As Ruiko arranges a get together so she can hear who Mikoto was making cookies for the other day, Kuroko comes across Minori again before being dragged along by Mitsuko Kongō to a pet shop. Meanwhile, Mikoto visits Heaven Canceller to hear about the status of the Sisters, learning they are being reconfigured so they may live longer than their originally intended two year lifespan. As Mikoto and Kuroko meet up at a family restaurant, they come across Shizuri and Frenda, leading to an awkward argument between Kuroko and Frenda over their respective partners, which is inevitably followed by an explosive punishment. After having a nabe party with everyone, Kuroko is relieved to see Mikoto back to her usual self.
42	18	"Moving" Transcription: "O Hikkoshi" (Japanese: お引越し)	August 16, 2013[3]
A mysterious organization oversees ITEM as they fight against a group of mechs. The next day, Mikoto and the gang visit Banri, who is due to be discharged from the hospital soon and will be moving into an apartment with Erii, who will be moving out of Kazari's apartment as a result. As the gang discuss about the move, Kuroko and Kazari reveals Judgement will be on duty for the upcoming Academy City Research Exhibition Assembly, where Academy City's top genius students will attend. Meanwhile, Mitsuko uses her power to stop a purse thief, only to be berated by a certain man for her actions. As the group gets together to celebrate Banri's dischargement, Kuroko and Kazari are called off for Judgment duties when the city's traffic signals suddenly go out. After finishing her duties, Kazari gives a box of taiyaki to Erii, serving as a memento of when she first told Erii about her ability of temperature preservation, and the two have a tearful farewell as roommates. As the group take a detour home, they come across a curious white-haired girl named Febri, who appears to know Mikoto. Meanwhile, the mysterious organization begins their next plan to show their power against espers.
43	19	"Academic Research Assembly" Transcription: "Gakuentoshi Kenkyū Happyōkai" (Japanese: 学園都市研究発表会)	August 23, 2013
The girls are unable to find out any more information from Febri, who appears to be a bit cautious around Mikoto and takes a liking with Ruiko. After Febri spends a night with Ruiko at Kazari's apartment, the group, believing Febri to be a Child Error, make arrangements for her to be moved to the orphanage in Asunaro Park in a week. As the gang heads to where the Academy City Research Exhibition Assembly will be held, Ruiko sets up some time for Mikoto to get along with Febri on their own. When Febri wanders off while Mikoto is not looking, the man from before spots her and sends some security bots after her. Luckily, Mikoto manages to rescue Febri, who apologizes for making her worry and comes to accept her. With Mikoto now involved, the man and his colleagues decide to include her in their experiments.
44	20	"Febri" Transcription: "Feburi" (Japanese: フェブリ)	August 30, 2013
As Yomikawa becomes curious over how the security bots functioned without any batteries, Konori treats Mikoto and the others by taking them to the public baths, where Mikoto lets Febri keep her rare pink Gekota finger puppet from her collection. Whilst heading home, the girls are led on a detour to a warehouse, where they are attacked by a mech. As Mikoto fights against the mech, which seems resiliant to her electricity, the mech suddenly stops functioning when it comes close to attacking Febri, allowing Mitsuko to defeat it with her Aero Hand ability. After Mikoto discovers the mech to be curiously unmanned, Febri comes down with a fever and is admitted into the hospital. Meanwhile, it is shown that Shinobu is working with the group targeting Febri. Back at the hospital, Mitsuko informs the others about how she, Kinuho Wannai and Maaya Awatsuki came to learn that the man from before was attempting to "reclaim" Febri. The next morning as Febri seems to make a full recovery, Heaven Canceller informs Mikoto in private that Febri is in fact an artificial human.
45	21	"Darkness" Transcription: "Yami" (Japanese: 闇)	September 6, 2013
Heaven Canceller goes on to explain to Mikoto that Febri's body secretes a poison, requiring her to suck special lollipops to neutralize it, leaving her angry that another dark organization is performing twisted experiments. Whilst keeping this a secret from the others, Mikoto runs into Misaka 10032 who, having visited Febri the previous night, informs her that Febri had been wanting to meet her own big sister. She also reveals Febri gained her knowledge via Testament, leading Mikoto to believe Shinobu is involved. After receiving a call from Mitsuko about the importance of trusting friends, Mikoto realizes she should not have to do this alone and decides to inform Kuroko and the others about Febri's condition, becoming surprised and relieved to find they are more than willing to help. As Mikoto and her friends tries to find clues related to Febri, Yomikawa gives Mikoto a capsule found in the unmanned mech suit. Heaven Canceller examines the capsule which contains a strand of hair similar to Febri's, possibly belonging to her sister. However, he also reveals to Mikoto that Febri only has enough lollipops to stay alive for another 72 hours. With Mikoto deciding to face the darkness of Academy City once more in order to save Febri, Heaven Canceller arranges for her to meet someone familiar with the underground, that being Therestina Kihara Lifeline.
46	22	"STUDY" (Japanese: STUDY)	September 13, 2013
Despite being mocked by Therestina, Mikoto refuses to leave until she gets information to save Febri. Therestina hesitantly reveals that Febri is an artificial human called a Chemicaloid, which her creators were going to showcase at the Academy City Research Exhibition Assembly. Mikoto tells the others about Febri's condition. Mitsuko, Kinoho and Maaya help Kazari identify the mysterious man as Haruki Aritomi, a longtime winner of the Academy City Research Exhibition Assembly. Kazari discovers that Aritomi and other student geniuses formed the STUDY Corporation and purchased a factory, which Kazari suspects is where Febri and her lollipops were being made. Mikoto heads to the factory, spots ITEM fighting mechs sent by STUDY and overhears that the mechs are controlled via a form of psychogenesis by the capsules inside them. After ITEM leaves, Mikoto enters the factory and finds Shinobu, who had taught Febri how to say Mikoto's name so she would be protected by her. Shinobu gives Mikoto the data to make more neutralizer lollipops, only to learn from Aritomi that the information is fake, as this confirms that he suspected Shinobu was a traitor. Aritomi orders Shinobu to inject Mikoto with a tranquilizer in exchange the real neutralizer data, but after Shinobu does it, Aritomi breaks his word and destroys the data. Febri is revealed to be a spare to his true project, Janie.
47	23	"Dawn of a Revolution (Silent Party)" Transcription: "Kakumei Mimei" (Japanese: 革命未明（Silent Party）)	September 20, 2013
Aritomi reveals he started Project Chemicaloid, which created Janie and Febri due to his bitterness that espers gain fame and recognition while intellectuals like him are ignored. To finally show their power, STUDY found a way to mass-produce espers which will bring forth a revolution upon Academy City tomorrow. Later, Shinobu explains to Mikoto how she was sold to STUDY after being captured by ITEM and was forced to work on the Chemicaloids, which were born from her research, becoming determined to save them. Using her own electricity to counter the paralysis in her body, Mikoto assures Shinobu that she does not need to take everything on by herself. Kuroko and the others arrive to rescue Mikoto, whilst Shinobu chooses to stay behind in order to do her part. After learning that 20,000 mechs, controlled by Janie's Diffusion Ghost ability, have been snuck into the Academy City Research Exhibition Assembly, with the Anti-Skills prevented from interfering, the girls make preparations to save Shinobu, Febri and Janie. The next morning, Kuroko, Kazari, Ruiko, Konori, Mitsuko, Kinoho and Maaya step up to face the mechs, whilst Mikoto and Febri head off in search of Janie.
48	24	"Eternal Party" (Japanese: Eternal Party)	September 27, 2013
The entirety of Judgment joins Kuroko and the others in fighting off against STUDY's mechs. Meanwhile, Mikoto and Febri arrive at STUDY's hidden base at a stadium, fighting off against the mechs that Aritomi sends against them. STUDY responds by sending a signal to cut off everyone's communications and sending more advanced mechs after each group. However, they overcome this thanks to Erii and Banri setting up a network of telepaths, with Kazari and Ruiko piloting their own mech that Mitsuko's father sent over, whilst ITEM help to destroy the mechs sent after Mikoto. Mikoto and Febri soon arrive at the underground base, where Aritomi, having no other plans to stop her, resorts to initiating the final phase in which he reveals his secret weapon: a cluster missile from space containing Diffusion Ghost that will destroy Academy City and everyone who is in it, by causing a chain reaction with the city's AIM fields. Aritomi attempts to kill himself, only to be stopped by Mikoto, who is determined to save everyone. With the assistance of the Sisters, Mikoto rides in Mitsuko's mech and launches into the atmosphere, using the mech as ammunition for a massive railgun to destroy the missile. After freeing Janie from STUDY's control and reuniting her with Febri, who is given more neutralizer lollipops, Shinobu makes plans to bring the twins to an overseas research facility to cure their condition. After saying their goodbyes to Shinobu and the twins, Mikoto and the gang discuss their upcoming vacation.
—	Bonus	"All the Important Things I Learned in a Bathhouse" Transcription: "Daiji na Koto wa Zenbu Sentō ni Osowatta" (Japanese: 大事なことはぜんぶ銭湯に教わった)	March 27, 2014[4]
As the local bathhouse comes under threat of being closed down, Mii enlists the help of Mikoto, Kuroko, Kazari and Ruiko to help promote interest, coming up with a Mikoto-powered "electric bath" to bring in more customers. At first, the baths become a success which attracts the attention of Erii, Mitsuko, Wannai, Atsuki, Yomikawa, Tsuzuri, Komoe, Shizuri, Frenda, Saiai, Rikō and the Dorm Supervisor. However, the baths are almost ruined after Kuroko adds too much bubble bath soap in one of her schemes to seduce Mikoto. After the customers go home, the girls celebrate by having a bath and drinking milk.

References

1. "A Certain Scientific Railgun TV Anime Gets 2nd Season". Anime News Network. October 21, 2012. Retrieved October 22, 2012.
2. "Funimation to Stream A Certain Scientific Railgun S Sequel Anime". April 11, 2013. Retrieved March 20, 2019.
3. A 22 minute preview of A Certain Magical Index: The Movie – The Miracle of Endymion aired on August 9, 2013 in place of a standard episode.
4. "A Certain Scientific Railgun S Book to Bundle New Anime Blu-ray". February 18, 2014. Retrieved March 20, 2019.

External links

• とある科学の超電磁砲S アニメ公式サイト(in Japanese)