While Kou was going to middle school in Nagasaki, he lost his mother to an illness. Futaba finally realizes the pain Kou feels over that sense of powerlessness. Hoping to open Kou's heart the way that Kou opened hers, she chases after Kou and desperately expresses her feelings to him.

Futaba sees Kou's vulnerability for the first time, then sends him home to where his brother and father are waiting. As the three of them sit around the dinner table, Kou finally tells them how he feels. The next day, Kou's friends notice something different about him. At last, the class term ends. Their shining summer is about to begin!