Daisuke is a 23 year-old new schoolteacher. He ends up being put in charge of a 3rd grade elementary school class since the previous teacher quit, and in that class there's a girl who's quite a troublemaker...

Subaru has only ever wanted to play basketball, but right after having transferred to a high school specifically to play in their basketball club the team captain, whom Subaru looked up to as a hero, vanishes...