A Certain Scientific Railgun: Season 1

In Academy City, Kuroko Shirai, a member of a public moral committee group known as Judgment, finds that her senior at Tokiwadai Middle School, Mikoto Misaka, has already dispatched some thugs that were targeted, much to Kuroko's chagrin. After physical exams at school, at which Mikoto is ranked a Level-5 esper, Kuroko invites her colleague Kazari Uiharu to meet Mikoto, and Kazari decides to brings along her friend and classmate, Ruiko Saten, as well. As the four go to a crêperie, where Kazari a

Mikoto invites Kazari and Ruiko over to her dorm room to hang out, ruining Kuroko's plans of celebrating her one-month anniversary as Mikoto's roommate. Upon learning that Kuroko had ordered aphrodisiacs for the occasion, Mikoto ends up fighting her in the hallway, only for both of them to be caught using their power by the fearsome Tokiwadai Dorm Supervisor. As punishment, both are sent to clean the school pool, where Mikoto is introduced to Kuroko's classmates, Kinuho Wannai and Maaya Awatsuki

Kazari and Ruiko are invited by Mikoto and Kuroko to visit the School Garden, a private district of Academy City where a large number of elite girls' schools are located. On the way, Ruiko ends up getting her uniform wet and has to borrow a Tokiwadai uniform. Whilst visiting a cake shop, Kuroko and Kazari are called back to Judgment and are informed of a case where several Tokiwadai students have been tased and had exaggerated eyebrows drawn on with permanent marker. Due to the uniform Ruiko is

Mikoto and the others discuss urban legends they have seen on the internet, including one about a mysterious woman who undresses in public. Of particular interest to Mikoto is one rumor concerning a boy with the ability to cancel out other abilities, reminding her of when she first met Toma Kamijo during an encounter with a group of thugs. While in town, Mikoto runs into Tōma as he tries to help a woman look for where she parked her car. When the woman suddenly starts undressing herself, Tōma ru

Whilst out on patrol, Kuroko and Kazari come across a couple of petty thieves stealing from a car in broad daylight. However, when Kuroko charges in, the thieves ambush her and injure Kazari as they make a quick getaway. Kazari scolds Kuroko for not only ignoring her warning, but also forgetting the promise they made together. Later that day, Mikoto is told the story about how Kuroko and Kazari first met in Judgment a few years ago. When Kuroko and her senior, Mii Konori, had gotten involved in

When an esper starts using gravitons to cause aluminum hidden inside stuffed animals to explode all over the city, Judgment struggles to identify the culprit as the only esper whose ability is known to match the necessary level of the incidents is in a coma. Kuroko warns Mikoto not to do anything drastic like track down the culprit herself, but after Kazari leaves her Judgment armband behind, Mikoto uses the chance of being mistaken for a member of Judgment by Konori to show Kuroko that she too

As Judgment and the Anti-Skills join forces to find the culprit behind the increasingly severe graviton bombings, Ruiko talks to Mikoto about the Level Upper, a rumored object said to increase an esper's level. The next day, Mikoto accompanies Ruiko and Kazari to the mall, where she runs into Tōma with the little girl whose bag she recovered the other day. After noticing a connection tying the graviton incidents, Kuroko and Konori realize that the culprit is targeting Judgment members, with Kaza

After Mikoto and the others visit an ill Kazari, Kuroko becomes curious as to how Level-2 esper Hatsuya had powers equivalent to those of a Level-4 esper. When Mikoto brings up the Level Upper urban legend Ruiko had mentioned before, Kuroko points out this is not the first time an esper's power and recorded level have been vastly different. Mikoto goes to a restaurant and pretends to be an interested customer to a group of male delinquents who may have relevant information. Mikoto eventually giv

Mikoto and the others meet with AIM specialist Harumi Kiyama, the immodest woman Mikoto had previously met, about the Level Upper. Ruiko, who had downloaded the Level Upper, keeps it to herself when Kuroko mentions its relation to criminal activities. Noticing Ruiko feeling down about being a Level-0 esper, Mikoto tries to assure her that an esper's level is not important, though this secretly irritates Ruiko further. The next day, Ruiko stumbles upon a boy being conned by a group of thugs over

Ruiko uses the Level Upper on herself and her friends, becoming happy just to have an ability of her own. Meanwhile, Kuroko takes care of more Level Upper offenders and gains more injuries in the process, keeping them a secret from Mikoto. Remembering when they ate shaved ice the other day, Mikoto and Kuroko come to the conclusion that the Level Upper is using synesthesia to manipulate multiple senses via a single stimulus. Kazari hears from Ruiko that her friends had suddenly fallen unconscious

Kiyama explains that she used the Level Upper Network to connect many brains as an alternative supercomputer since she was not allowed to use the Tree Diagram supercomputer. She assures Kazari that the victims will be released soon and gives her a cure program. When she is roadblocked by the Anti-Skills, she harnesses the power of the Level Upper Network, called Multi-Skill, to utilize the various abilities of the victims to defeat them. Mikoto arrives and battles Kiyama, who blocks her every at

Mikoto attempts to fight the creature as it heads towards a nuclear power plant, but finds her attacks only cause it to regenerate and to grow larger. With the network out of control, the comatose Level Upper users start screaming in pain. Kiyama explains how the creature, called AIM Burst, is the result of the 10,000 Level Upper users' AIM fields and their negative thoughts. With the help of Anti-Skill members Aiho Yomikawa and Tsuzuri Tessō, Kazari manages to upload the cure Kiyama gave her, a

Kinuho and Maaya ask Mikoto and Kuroko to help them be models for an online swimsuit catalog, also inviting Kazari, Ruiko, Konori and Kuroko's rival, Mitsuko Kongō. After choosing their swimsuits, the girls begin their shoot in a holographic studio that can replicate various environments down to the touch. The shoot goes well at first but the hologram system malfunctions, causing the environment to switch into weird settings, including a blizzard, a desert, a hurricane, and even the moon (with a

Ruiko, along with other students who had used the Level Upper, must attend a special class at a certain high school. Their first lesson, taught by the petite teacher Komoe Tsukuyomi, is about the importance of having a personal reality for ability development. During lunch, Ruiko once again encounters Miho, with whom she had been exchanging letters since their incident. Later, for their PE segment, Yomikawa has the class continuously run laps as an example of how one can surpass one's own limits

Mitsuko finds herself attacked by a Skill-Out gang called the Big Spiders, but is saved by a long-haired man with a spider tattoo, the description of whom Konori seems to recognize. This incident is shown to be the latest in a string of indiscriminate attacks on espers by the Big Spiders, led by one calling himself Wataru Kurozuma. Whilst investigating the gang's home turf in Academy City's 10th District, Mikoto and Kuroko come across the long-haired man who becomes their guide to the district.

While Konori avoids coming to work following her encounter with Kurozuma, Mikoto and the others meet up with Konori's roommate, Aomi Yanagisako. Aomi reveals that Konori was once a member of the Big Spiders, which was a friendlier group back then and, despite being an esper, she was allowed to stay by Kurozuma, with whom she fell in love. When Mikoto receives word that the Anti-Skills will be leading a surprise crackdown against the Skill-Out gangs the next day, she confronts Konori to ask why s

After having a bad day, Tsuzuri does a curfew run at an arcade where she meets a boy named Haruki Kōnoe, one of Kazari and Ruiko's classmates. As Tsuzuri's Anti-Skill duties get worse, Yomikawa gives her a day off to finish her teacher work. Later that day, she encounters Kōnoe at the arcade and teaches him how to get a secret character in her favorite beat 'em up game, "Gekisho 9". While carrying a drunken Yomikawa home, Komoe gives Tsuzuri a speech about the joys of helping others, inspiring h

After suffering the wrath of the Dorm Supervisor yet again, Kuroko seeks revenge and takes Mikoto with her to follow the Dorm Supervisor on her day off. They eventually arrive at an orphanage for Child Errors in Asunaro Park where, to their surprise, the Dorm Supervisor shows a kinder side to the children there. After spotting Kazari and Ruiko, who are helping out with their teacher Daigo, the girls realize that the Dorm Supervisor is in love with Daigo. Hoping it will change her attitude at the

The Tokiwadai Middle School dormitory hosts the Midsummer Festival, an invitation-only event with most of the students dressed as maids. As Kuroko gets dragged by Maika Tsuchimikado to help in the kitchen, Mikoto gives a tour of the festival to Ruiko and Kazari, the latter of whom is very excited to experience the life of a Tokiwadai student. Mikoto, however, grows anxious as news of her upcoming stage performance spreads and raises expectations. As she nervously prepares for her stage debut, Mi

The episode starts off with a moderate sized night time earthquake that disrupts Mitsuko from studying. After the quake subsides, Mitsuko's teacup mysteriously falls down from her desk, along with her entire doll collection floating around. The next day, Kazari is informed by Daigo that she is getting a new roommate, a transfer student named Erii Haruue. Mikoto and Ruiko take Erii out to show her around while Kazari, Kuroko and Konori attend a meeting held by Therestina Kihara Lifeline of the Mu

Following the Poltergeist incident, Mikoto wonders if Kiyama is once again involved, though Kuroko reminds her that Kiyama is supposedly still in custody. Kuroko instead suspects Erii as the cause, since most of the Poltergeist attacks have been occurring at places she has been. Both of them do a clandestine background check on Erii and learn that, despite being a Level-2 telepathic esper, she can exhibit Level-4 powers under certain catalysts. Kazari takes Erii to the park, where Erii explains

Erii explains that both she and Banri were both telepaths who had grown up in an orphanage for Child Errors before Banri had moved, but she has recently begun hearing Banri suffering and has been trying to find her ever since. Mikoto explains about the Level Upper experiment to Therestina, who theorizes that Kiyama's comatose students are the cause of the Poltergeist incidents. However, this theory divides Kazari and Kuroko even more, as Kazari thinks Kuroko is now blaming them instead. The next

Still feeling concerned, Kazari goes to see Kiyama and convinces her to share information with MAR to help her students. However, Therestina destroys Kiyama's data and refuses to let them see either Erii or the children. When Kazari tells her friends what happened, they learn that Therestina is in fact Gensei's granddaughter, who was the first test subject of his Ability Crystal program. Realizing she was tricked, Mikoto confronts a battle-suited Therestina at the MAR Base Research Laboratory, b

Kiyama is after the MAR trailers, unaware they are decoys filled with the MAR Troops, but is saved by Mikoto. Kuroko, Mitsuko, Yomikawa, Tsuzuri and the Anti-Skills hold off the rest of the MAR Troops. Kiyama, Kazari and Ruiko head towards Kihara's laboratory, whilst Mikoto defends them from Therestina, who attacks with a giant large mech. Although Therestina's mech is unaffected by Mikoto's basic attacks, Kuroko helps Mikoto destroy the mech by using its own arm as an improvised railgun. Mikoto