"K" Fubatong humanities. Misaki Yata lost her memory due to a head injury during a fight with Fushimi Saruhiko. When she woke up three days later, her memory returned to the time when she first joined Barbara. Yata asked why Fushimi wasn't there, Jusu said that Fushimi had gone shopping and came over to see you immediately, and then called Fushimi to ask him what to do. Fushimi learned that Yata lost his memory and thought this was an opportunity to change his favorability. In addition, Jusuke and Kusanagi also felt that Misaki should wait until Misaki regained his memory before telling him the truth (Fushimi had already betrayed the Akagumi and went to the Aoigumi). The heavy responsibility of helping Yata regain his memory fell on Fushimi, who was closest to him. Fushimi asked the room chief for a long leave to spend time with Yata. Everyone in Barbara is also actively cooperating. In the process of searching for memories, Fushimi gradually realized why he and Yata were separated, and the relationship between the two changed subtly...