Sensei hopes that visiting Sana in her dorm will help assuage some of the jealousy she showed about his relationship with her mother and Ayane. However, he finds that both those people are already there with her, getting drunk. They want Sensei to tell Sana to "loosen up", but Sensei (after observing that Ayane is safely asleep) says that Sana is one he came to see, which Sana appreciates. Thinking about how he wants to protect Sana, and how Sana feels "cornered" even surrounded by people he likes, Sensei almost remembers something about his past. Sana says that she was serious about learning karate, to her mother's surprise. One of Sana's comments inadvertently causes her mother to remember something unpleasant, and they both leave.