Spring in her first year of high school, in the throes of adolescence. Yukari has yet to find something she is passionate about. Then she meets Mimi (a.k.a. Dokudami-chan), a weed-loving girl, and the two of them decide to work together as the 'Weed Research Club = Zakken'! The Weed Research Club of Tokyo Metropolitan Hibiya High School provides the coverage! This is a club activity story where real high school life and plant knowledge can be acquired in a fun way.