Freshman Reception!
Ui makes it into Yui's school as a freshman, as well as new student Azusa Nakano. When the class arrangements are announced, Yui, Mugi and Ritsu end up in the same class, whilst Mio ends up in a different class with Nodoka. The group put up with Sawako's ideas of promoting the club by dressing them up as animals. Ui and her friend visit the club only to find everyone dressed as maids. However, the band find it impossible to play with the outfits on. Meanwhile Azusa walks around looking for a club that's right for her. The group gets ready for a live performance, but Mio is too embarrassed to do the vocals, so Yui does them instead. Yui forgets the lyrics, but Mio manages to back her up. Ui brings Azusa to watch the show, who is so moved by it that she goes to join the club.
Aired 22/05/2009EP 8 - Freshman Reception!

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)