Upperclassmen!
When Azusa comes to the realisation that the light music club has been slacking as of late, she becomes determined to practice more. Azusa runs into Tsumugi alone in the club room and tries giving her some guitar lessons. She later is about to get a chance to practice alone with Mio, but is interrupted when Ritsu requires help from Mio and the girls end up spending the evening at Ritsu's house. The next day, Azusa runs into Yui in the club room hoping to practice, but ends up cleaning Ton's tank and helping her with understanding how to play the song Tsumugi composed, as she cannot read sheet music. Yui reminds Azusa that she is who she is, and personalizes her keychain.
Aired 21/07/2010EP 16 - Upperclassmen!
K-ON! Season 2
It is the new year, which means that the senior members of the Light Music Club are now third-years, with Azusa Nakano being the only second-year. The seniors soon realize that Azusa will be the only member left once they graduate and decide to recruit new members. Despite trying many methods of attracting underclassmen—handing out fliers, bringing people into the clubroom, and performing at the welcoming ceremony—there are no signs of anyone that plans to join.
While heading to the clubroom, Azusa overhears Yui Hirasawa say that the club is fine with only five people and that they can do many fun things together. Changing her mind, she decides that they do not need to recruit any members for the time being.
K-On!! revolves around the members of the Light Music Club as they experience their daily high school life. From rehearsing for concerts to just messing around, they are ready to make their last year together an exciting one!
(Source: MAL Rewrite)