In a flashback, Harumi is shouting at Gensei about the outcome of an experiment gone wrong, to which Gensei cooly replies that "It's a good thing, we are getting rid of 'Child errors'". Back to the present day, Harumi looks at an apparently unconscious Mikoto, who is buried under the rubble she created. As she turns around, Misaka jumps out from underneath the rubble to 'hug' Harumi, explaining that she doesn't have a blind spot due to her body constantly emitting electro-magnetic waves. Mikoto attacks with a 'zero distance electric shock' before Harumi can counter, which knocks Harumi out temporarily. Their minds link and suddenly Mikoto is seeing a flashback from Harumi's memories - before the flashback at the beginning of the chapter.