Rou Kyu Bu! summary:

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 leaving behind rumors that he ‘eloped’ with a grade-schooler! The team is disbanded and the members are shunned by their schoolmates. In the middle of this Subaru’s aunt, who teaches grade school, asks Subaru to come coach a girl’s basketball club at her school. At first Subaru wants nothing to do with it, but the determination and drive of one of the girls on the team gives him a change of heart.