Koibito ga Ubu Sugite Komaru

Hasegawa is a quiet high school student who is suddenly confessed to by Hiyama, the class's outgoing and cheerful guy. When Hasegawa asks, "What do you do when you're dating?" Hiyama proposes a diary exchange. Despite the unexpected innocence, Hasegawa accepts the confession. Two classmates who have never spoken in class gradually close the gap and discover love—a pure and innocent youth story!