Blu-Ray. The K-On! animated television series is based on the manga series of the same name written and illustrated by Kakifly. The episodes are produced by the animation studio Kyoto Animation and are directed by Naoko Yamada, written by Reiko Yoshida, and features character design by Yukiko Horiguchi who based the designs on Kakifly's original concept. The story follows four Japanese high school girls who join their school's light music club to try to save it from being abolished. However, they are the only four members of the club, one of which has little experience with guitar playing.