Hirasawa Yui, a young, carefree girl just entering high school, is captivated the moment she sees a poster advertising the ‘Light Music Club’. Being the carefree girl that she is, she quickly signs up. However, Yui has a problem as she is talentless and unable to play an instrument.
When Yui goes to the clubroom to explain to the other club members, she’s greeted by the other members: Ritsu, Mio and Tsumugi. Although disheartened at Yui’s lack of musical know-how, they still try to convince her to stay to prevent the club’s from being disbanded for having too few members. After playing Yui a short piece which re-ignites her imagination, they succeed in keeping their new member and future guitarist.
Along with the tasks of school and homework, Yui begins to learn the guitar with the help of the other band members, experiencing many mishaps along the way. However, with the school-festival drawing near and Yui getting stuck with her practice, will the Light Music Club be ready in time for their debut?