Kazusa's overworking finally catches up to her, and she collapses two days before the school fair. Haruki cares for her as he continues to practice his guitar. Kazusa, in a (possibly) fevered state, tells him about her troubled relationship with her mother Youko. But meanwhile, at the concert rehearsal in the gym, Setsuna is separated from the other two and feels lonely and afraid her first time on stage.

Haruki hears about Kazusa's moving from her mother, who she hadn't been on good terms with. He feels betrayed and angrily confronts her. But his words force open the door to Kazusa's heart, which she had desperately tried to keep closed so that the three of them could stay together.

At last Haruki realives Kazuma's true feelings, but while he's confused at this sudden turn of events he can't hide his joy that the girl he loved best likes him too.

At last, Haruki sleeps with Kazusa. Her wish finally comes true, and she prepares to leave for Europe. Haruki takes Setsuna to the airport, hoping that they can all be together once again. When the three are reunited, everyone remembers the best moment of their lives: the last song they sang at the school concert. The title of the song was...