Set Match!

The manga centers on Haruha, a timid girl who is careless with punctuality. On the entrance ceremony at her new school, she sees an upperclassman she likes, and decides to join the soft tennis club because of it, only to find out that the club is led by a teacher who is strict on punctuality. Haruha's mood begins to sour when she compares herself to everyone else in the club, until her teacher gives her a piece of advice. (Source: Anime News Network)