Miyabi (Sugisaki Hana), who remembers having dinner with Sanpei (Wakaba Ryuya), Ayano (Okayama Amane), and Mai (Ikuta Erika) in the past, wonders if Mai knows something about her engagement with Sanpei and asks her about that memory. However, while it is true that Miyabi and Sanpei often hung out together at the time, she says she doesn't know the details about the engagement, and Sanpei is the only one who knows the truth... Miyabi finally decides to confront Sanpei himself.
Meanwhile, Miyabi happens to bump into Nishijima (Sakami Kaori) and is frightened when she sees the man walking next to Nishijima and freezes up. After hearing the story, Sanpei...
Meanwhile, Miyabi hears from Mai that Professor Osako has not told her something, so she visits Osako (Iura Arata), but he doesn't answer. However, something happens and she calls Miyabi and begins to talk about her feelings.
