TMNT X K-ON!= T-ON!

Today is Mikey's first day of high school, and he's desperately searching for a club to join. At the same time, Raph, the drummer, and his friend Leo, the bassist, are desperately trying to save the school's light music club, which is about to be disbanded due to lack of members. They manage to recruit Donnie to play the keyboard, meaning they only need one more member to get the club running again. Mikey joins, thinking it will be an easy experience for him to play the castanets, the only instrument he knows. However, the other members think their new addition is actually a guitar prodigy.