Mikoto, Kuroko, Kazari, and Ruiko take action against a gang of bank robbers. When Ruiko is injured trying to rescue an innocent bystander, Mikoto angrily unleashes her railgun power!

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Mikoto and Kuroko get in trouble for using their powers in the dorm. Their punishment: pool cleaning duty! Later, Kuroko finds herself feeling frisky after accidentally ingesting a powerful aphrodisiac!

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Someone is tasering students and drawing on their faces with permanent marker! While Kuroko and Kazari investigate, poor Ruiko becomes the latest victim. Who is behind the unusual attacks?

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Awkwardness ensues when Mikoto runs into Kamijo. When they meet again later in the day, Mikoto demands a duel! She gives it her all, but there’s a chance she’s no match for Kamijo’s powers.

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Uiharu and Kuroko have an argument that leads to recollections of the past, when the girls were young Judgment recruits, and a dangerous mission resulted in a life-long promise between friends.

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Someone is planting bombs all over Academy City, and it’s up to Judgment to stop the person responsible. Mikoto, wanting a piece of the action, uses Uiharu’s badge to investigate on her own.

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As Kuroko and Konori begin to suspect Judgement officers are the true targets of the mysterious bomber, Uiharu, Mikoto, and Saten find themselves in an explosive situation while shopping!

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Mikoto and Kuroko ponder the ramifications of Kaitabi’s shocking display of strength and wonder if Level Uppers actually exist. Before they can find answers, Kaitabi mysteriously slips into a coma!

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Even as Mikoto and Kuroko question Dr. Kiyami about the side-effects of Level Uppers, Saten wonders if she should use the one she recently found - even though there could be dangerous consequences.

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Saten falls into a coma after she confesses using a Level Upper to Uiharu. Later, Mikoto and Kuroko discover that all of the recent coma patients are connected - in more ways than one!

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After inadvertently connecting to Kiyama’s mind, Mikoto learns what’s been motivating the doctor’s actions. Later, when the network goes out of control, Mikoto comes face to face with a monster!

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The girls work to stop the monster before it reaches a nuclear power plant! Uiharu’s efforts slow the abomination down, but Mikoto might be the only person able to stop the creature’s rampage!

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The Swim Club recruits Misaka and the gang to strut their stuff as swimsuit models! Later, after taking a break from posing and primping, the girls work together to make some curry.

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Saten and the other students who used the Level Upper learn some valuable lessons when they attend a special weekend workshop taught by Komoe and Yomikawa.

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Misaka and Kuroko investigate a gang called Skill Out. The group is known to be attacking Espers all over Academy City - but in some instances, a mysterious man arrives just in time to stop the confrontation.

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Konori’s past with Big Spider is revealed. In the present, she finds herself torn. Can she honor her responsibilities as a Judgment officer while somehow remaining loyal to Kurozuma?

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After Komoe and Yomikawa encourage her to get a hobby, Tesso rediscovers an old school arcade game she loved as a child and forms an unlikely bond with a fellow fan.

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Misaka and the girls decide to play matchmaker with their dorm’s Head Resident and Daigo, Uiharu and Saten's teacher. Things look to be working out - until Daigo brings up the subject of marriage.

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The midsummer festival arrives, and students are preparing to show off their school for friends and family. Misaka’s scheduled to perform a violin solo for the festivities - if her nerves don’t get the best of her!

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The gang discovers that the recent wave of earthquakes is connected to a phenomenon called poltergeisting - and there’s a chance Uiharu’s new roomie might be somehow be involved.

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Kuroko suspects Haru'ue has something to do with the recent poltergeisting events, and it’s causing tension between her and Uiharu. Later, Haru'ue reveals a hidden part of her past.

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The past comes into focus as Haru'ue and Edasaki’s connection to a common Child Error facility is revealed. Later, Misaka sets out to find Kiyama after learning that the rogue scientist is out on bail and working with the Frog Doctor.

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Therestina reveals new information about her real identity and her master plan. Meanwhile, Kuroko and the gang vow to fight alongside Misaka in order to save the children jeopardized by Therestina’s activities.

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Misaka and her friends reach the facility where the children are being held, but Therestina uses Capacity Down to take the Espers out of the fight. With everything on the line, it’s up to Saten to save the day.

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Haru'ue joins Saten and Uiharu on a trip to the Garden of Learning to see Misaka and Shirai, as well as to do some shopping. They later go to visit Edasaki in the hospital, where she is undergoing physical therapy, when things take an unexpected twist.

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After dreaming of her past, Misaka sets out for a day of shopping, but when Kuroko suggests a shortcut, they find an envelope with a cash card in it--one of many placed throughout town. Elsewhere, Saten thinks she sees someone who looks like Misaka.

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Rumors swirl about that Misaka is the template for a project to produce Level 5 clones. When Nunotaba refers to her as the "Original," Misaka decides to check her out, and learns that she worked at the hospital where Misaka submitted her DNA map.

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In high spirits, Misaka joins the other girls for a day of shopping at Seventh Mist, where she helps the others with their shopping, as well. Misaka spends another day playing with children. One of Misaka's clones goes through the phases of her training.

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Finding herself face-to-face with a clone of herself, Misaka ends up helping her get a cat out of a tree, sharing ice cream cones, and having tea with her. It isn't until later that Misaka discovers the true, sinister project that calls for her clones.

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Misaka lashes out at Accelerator, but is left frustrated. She realizes the full breadth of the situation she has become involved in, and feels responsible for allowing it to happen. Nunotaba discusses the ramifacations of the clones' existence with Misaka.

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Misaka manages to sabotage most of the experimental facilities remotely before she is cut off, leaving her to deal with the rest in person. Shirai resolves to help Misaka by doing her part to be more vigilant at work, but risks shutting the others out.

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The members of the underworld organization Item finish one mission, and are called in to defend the remaining facilities. When Misaka tries to infiltrate one building, she encounters Item member Frenda.Meanwhile, Nunotaba drops in at the other facility.

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As Misaka continues her way into the research facility, she and Mugino play a game of cat-and-mouse. Meanwhile, at the other facility, Nunotaba sneaks into a control room, planning to disrupt the experiment by adding a new factor to the Misaka Network.

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Having realized who Misaka is, Mugino decides to give her a run for her third-place ranking. When Frenda mistakenly leaves her doll-bombs behind while heading to the other facility, Misaka collects them and uses them to supplement her diminished powers.

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Misaka and Kamijo meet again at the malfunctioning vending machine in the park, where Shirai mistakes him for being Misaka's boyfriend. Misaka becomes shaken when she bumps into another Misaka clone, and learns that the experiments are still ongoing.

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Misaka sets out on one last mission to put a halt to the experiments by destroying the supercomputer Tree Diagram. Meanwhile, Kamijo runs into Misaka's clone #10032 again, and the two of them decide what they should do about a stray kitten she has found.

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Thwarted in her attempt to sabotage Tree Diagram, Misaka takes her frustration out on a nearby lab that is part of the project. Meanwhile, Accelerator and #10031 carry out their experiment, while Kamijo searches for Misaka's missing sister.

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While Shirai frets about Misaka staying out again all night, she receives a visit from Kamijo, who manages to find Misaka's documents about the project. Kamijo catches up with Misaka on a bridge, where he tries to talk her out of doing anything rash.

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Kamijo races to the scene of the experiment, only to find that it has already started. Kamijo calls out Accelerator, who takes him to be yet another challenger to his position, until for the first time, as Misaka watches on, he gets his nose bloodied.

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Misaka stands up for clone #10032, declaring that she is doing so because they are sisters. The next day, the two of them spend time in a park, where 10032 asks her for a special favor. Later, Misaka has difficulty trying to express her thanks to Kamijo.

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With the end of summer vacation approaching, the girls plan a study session at Saten's apartment to catch up on homework. Everyone is to bring an ingredient for a potluck stew party, but most have trouble deciding what to buy, leading to some surprises.

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Edasaki is due to be discharged from the hospital, and it is learned that she will be living with Haru'ue. The move is bittersweet for Uiharu, who is losing her roommate, but she feels it is for the best. Meanwhile, a new movement is afoot in the city.

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Febri takes an instant liking to Saten, and is warm to everyone except for Misaka, much to her chagrin. At Judgment, Uiharu is unable to find any information on who Febri is, so arrangements are made to admit her into an orphanage as a "Child Error."

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As Yomikawa takes over investigating the runaway security robots, Konori invites the whole gang out to take in a bath at a bathhouse. On their way home, a number of detours lead them to a confrontation with yet another, much more dangerous runaway robot.

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With the revelation that Febri is synthetic, Misaka is determined to find whoever built her, and have them fix her. The investigation is stalled on all fronts, even with the help of her friends running down leads, until help comes from a surprise source.

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Therestina reluctantly provides Misaka with the clues she needs to find the group behind Febrie's secret. With Kongo's help, the girls identify Aritomi as the man they are pursuing, and find out more about him and his company, the STUDY Corporation.

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Aritomi reveals his motivations for STUDY's project to Misaka. She also learns about Nunotaba's plight, and some of the details concerning what STUDY has planned at the Reach Assembly the next day. Will she be able to escape and put a stop them?

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Shirai, Konori, Kongo and friends, and Uiharu and Saten confront the powered suits at the four Assembly sites, where they soon receive backup. Misaka and Febrie move to take on Aritomi directly, but he has one final surprise up his sleeve for them.

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