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)

2D-kun calls Banri and tells him that he heard Banri was lonely. He offers to hang out, but Banri already has plans with Kōko. As they discuss their wish to hang out with Mitsuo (who has been too busy lately), Kōko arrives and overhears the conversation. She is suspicious until Banri hands over the phone and she discovers it is 2D-kun to whom Banri is speaking. Finding out that Mitsuo may have a girlfriend, she formulates a plan to determine her identity and enlists Banri's and 2D-kun's help. They start by watching Oka-chan’s house, thinking that she is the most likely candidate. Oka-chan discovers them, though, so Banri tells her they were just visiting her. To their surprise she tells them she’s free to hang out, and when asked she admits that she’s not seeing anyone and that she hasn't seen Mitsuo since summer vacation started. Oka-chan invites them in, where they observe that the house is empty except for Oka-chan’s room. She explains that her family has moved away and that she will live alone while she finishes college. Kōko admits that she’s jealous of Oka-chan. Oka-chan replies that she is worried about living on her own for the first time. They reaffirm their decision to go to the beach together. They all go to the place the Film Club hangs out, but before they get there they observe Mitsuo and Linda walk in together as if on a date. To allow Mitsuo and Linda some privacy they decide to go somewhere else. Later Kōko arrives at Oka-chan’s house with a bag full of swimsuits. The two of them try the swimsuits on, and discuss Kōko’s and Banri’s relationship, and Kōko tells about Banri resisting her kiss in the park. She admits that she never feels they are “in the mood” when she and Banri are alone in his apartment. Oka-chan points out that Banri probably resists because he wants to show Kōko how much he really cares for her. Kōko tells Oka-chan that she wishes she could spend more time with Banri at his apartment. She admits that she questions whether Banri really loves her and is afraid he will disappear someday. She wonders if Banri is trying to find himself and if he does so if will he leave her. Kōko then states that the next two swimsuits she pulls out of her bag will be what she and Oka-chan will wear to the beach. They turn out to be school swimsuits. Oka-chan likes the idea and films them while wearing the swimsuits. Later in Banri’s apartment, Mitsuo and Banri discuss their swimwear choices as well. Mitsuo wishes he could have invited Linda and wonders where her hometown is located. Banri lies and says he doesn't know.

(Source: Wikipedia)