Enquanto Shirai tenta localizar os utilizadores de Level Uppers, Saten usa o seu próprio Level Upper e entra em coma, levando a descobertas inesperadas sobre o fenómeno.

Numa tentativa de resolver a atividade poltergeist que agora ameaça destruir a Cidade Académica, Heaven Canceller liberta Kiyama.

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.

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.

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.