Read manga: Kokuhaku Gokko

manga
Summary:

Iri and Yukimi have been best friends for two years, and they have something in common--both of them have crushes on two of the coolest guys in school! But they both decide to change that. Iri talks Yukimi into making a game out of it. They'll both do their best to confess their feelings to their crushes and see what happens. But then, Iri begins to make more progress than Yukimi...?