Manager no Oshigoto

Mizuki Shida, a girl who loves basketball, gave up on continuing as a player due to an injury she sustained in middle school. In high school, she makes a fresh start and resolves to work hard as a manager for the powerful boys' basketball team, which has participated in the Inter-High School Championships. But all the members of the team are handsome! Mizuki is confused by the atmosphere, which is almost like that of an idol group...!?

(Source: Shueisha, translated)