Kōko suddenly falls ill and does not come to school for several days. When she does return, Banri notices she is dejected, but she denies anything is wrong, until she breaks down in tears and relays to Banri her fears that he might one day leave her. Banri reassures her he will not, and the spirit of Banri, who was observing, comments on a similar situation between him and Linda. In a flashback to the summer of their third year in high school, Linda tells Banri that she learned that her brother's fiancé was having an affair, and gets him to help her expose it. When the two photograph the affair, Linda has a change of heart and deletes all the photos, and instead confronts her brother's fiancé and tells her she will keep it secret, but to never let it happen again. Afterwards, Barni vehemently voices his disapproval of her decision, but apologizes when he notices how troubled she is by her own deceit. Banri comforts Linda by saying she is not alone, and he will bear the lie she knows with her, and will always find her and be there for her, but he fails to reassure her when she asks. In the present time, Banri and Linda meet and talk, where Banri mentions Kōko is sick again, while Linda mentions her family and brother. When Banri shows he does not remember she had a brother, a saddened Linda leaves, but not before she uses the words he used to comfort her in the past to encourage him to be there for Kōko. The spirit of Banri who witnessed this, regrets that he did not confess his true feelings for Linda in the moment she sought reassurance from him, and notes that it is too late for them. However the next morning, the spirit of Banri awakens to find himself back inside his physical body.

(Source: Wikipedia)

Kōko enters Banri's apartment alone after going through his mail because she misses him so much. After throwing a tantrum and sniffing Banri's pillow, she tries to get a hold of herself by doing The Exorcist. Nana catches her in the act, then suggest that Kōko do that during Nana's next show, but Kōko refuses. Kōko then tackles Nana in a stranglehold, trying to get Nana to not tell Banri that she went into Banri's room and did what she did while he wasn't there. Kōko agrees to do anything else to help, and Nana takes her up on her offer, using her as the guinea pig for another idea for Nana's act. Meanwhile, at the Banri home, Linda and her brother show up to go to the class reunion. During the drive, Linda spots the mirror Kōko gave to Banri, and determines that Banri is very nervous. At the high school, Banri becomes so nervous about not having his memories that he won't move, so Linda tricks him to into entering. They arrive and everyone puts on a red or blue shirt with nametags to play a dodgeball game rematch when Banri's team beat Linda's team on a hotly disputed technicality. After Linda uses the same technicality to win the game, the class catches up at the party with many of his classmates warmly welcoming him despite his not remembering any of them. They then start relating stories of the old Banri, much to his embarrassment. When their sensei arrives and relates another characteristic of old Banri, Banri feels even worse, but soon after taking pictures with former classmates he feels better. Later that night, Linda and Banri talk on the way home and how Linda is happy that Banri has finally accepted his situation despite all the friction between them, as well as how Linda has come to accept their situation as well. Banri then goes to take a picture of the bridge where he fell, then experiences a vision of the accident. He tries to save the ghost Banri but ghost Banri forces himself to fall, and new Banri drops his mirror and breaks it, wondering if his memories are returning.

(Source: Wikipedia)