It is summer vacation and Nanami goes to school for the play rehearsals, but she's pretty annoyed that Motoharu doesn't turn up to any of them. Even at the summer festival he doesn't turn up, so Nanami goes to his house to see him. Motoharu reminisces on his past relationship with Nana.

Nanami and Motoharu's study session in interrupted when, out of the blue, Yuri turns up on Motoharu's doorstep, with something to tell him about her sister. It's to do with the reason why Nana was in Kagawa's car 2 years ago. Soon after that Nanami and Motoharu end up having a quarrel about it.

In an unconventional way, Motoharu finally confesses to Nanami, the sin he committed to Yuri. Since then Nanami hasn't been able to face him but they eventually fix the problem in their relationship. With things looking good for the pair, they decide to go to the beach to spend the day having fun but if only it could be that simple.

The relationship between Nanami and Motoharu has ended and a week has passed without even as much as a word between them. Takeuchi just can't sit back at let things continue as they are, so he invites Nanami over to cheer her up. Motoharu is beginning to regret what happened between him and Nanami.

Preparations for the annual Cultural Festival are progressing smoothly but what hasn't progressed is Nanami's relationship with either Motoharu or Takeuchi. Motoharu is trying to organize his feelings for Nanami and Nana whereas Takeuchi is planning to settle things soon. The day for the Cultural Festival arrives and Nanami meets Takeuchi's sister.

After some thinking Motoharu decides to tell Nanami all about Nana, so he invites her out. But it quickly becomes sort of like a date, when they go to see a movie to pass the time. Though soon afterwards thing become serious as Motoharu finally decides to open up, however it may not entirely be what Nanami wants to hear.