Sket DanceSket Dance.

Sket Dance (stylized in all caps) is a Japanese manga series written and illustrated by Kenta Shinohara. It was serialized in Shueisha's shōnen manga magazine Weekly Shōnen Jump from July 2007 to July 2013, with its chapters collected in 32 tankōbon volumes. The series follows the adventures of the Sket-dan, a high school club whose goal it is to help the students and teachers of Kaimei High School with their problems, as they do whatever it takes to help make their campus a better place.