K-ON! is a tV series anime that premiered in spring 2009, produced by Kyoto Animation.

About the production: the story comes from a manga, there are 13 episodes of about 24 minutes and its current status is "finished".

Its main genres are comedy, music and slice of life, with themes such as Cute Girls Doing Cute Things, School Club, Band and Primarily Female Cast.

On AniList, K-ON! has an average score of 78%, a very good score, and appears on 283,925 users' lists.

The franchise continues in or follows from: K-ON!!.

Hirasawa Yui, a young, carefree girl entering high school, has her imagination instantly captured when 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, she is unable to play an instrument. When Yui goes to the clubroom to explain, 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 disbandment. After playing Yui a short piece which re-ignites her imagination, they succeed in keeping their new member and 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? (Source: MAL Rewrite)

Official synopsis from AniList.