Toaru Kagaku no Railgun: Harumi explains to Kazari that she used the Level Upper Network as an alternative supercomputer as she wasn't allowed to use the Tree Diagram supercomputer. She assures Kazari that she will release everyone once she's done, giving her a cure program. When she is roadblocked by the Anti-skills, she uses the Level Upper's Administrator power; Multi-Skill, to defeat them. Mikoto arrives and battles Harumi who blocks her every attack until she lets her guard down, during which Mikoto gets close to her and shocks her. In the process, Mikoto experiences flashes of Harumi’s memories. In the past, Harumi was assigned by her boss, Gensei Kihara, to be a teacher to a group of Child Errors to prepare them for an experiment, growing fond of them in the process. However, the experiments went horribly wrong and the children ended up in comas, with Kihara deciding to cover it up. Harumi explains she wanted to find a cure to save her students by using Tree Diagram, but was denied every time which led to her creating the Level Upper Network. Her anger soon causes her to lose control of the network and fall unconscious, and a strange fetus-like creature emerges from her head.

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Action, Animation, Comedy, Japanese, Sci-Fi