Right after starting middle school, Akari Akaza joins the Amusement club, whose only other members are her two childhood friends, Kyoko Toshino and Yui Funami. Chinatsu Yoshikawa, Akari's classmate, becomes the fourth member after falling head over heels for Yui. The Amusement club meets at the abandoned tea ceremony room and has no clear purpose, leaving the girls to do whatever they want. More often than not, Kyoko stirs up some wild scheme to get everyone in trouble as a means to pass the time and experience the ideal middle school life!
The antics run high as the members of the Amusement club try to focus on doing homework, and come up with nicknames for each other. Meanwhile, something mysterious is going on inside the student council room.