Extracurricular activities are mandatory in the Yumenosaki idol course. Every student must be in one club, but joining a committee is optional. All clubs must have at least 3 students, or it will be dissolved. The exception to this is the Ninja Association, due to Mao Isara, the student council secretary, vouching on its behalf.
Clubs (部活 bukatsu) allow students to hone their skills and form bonds with students who share their same interests.
Committees (委員会 iinkai) are a way for students to get involved in the hands-on work related to idol performances, as well as make connections within the industry related to that committee's field.
Clubs were originally voluntary. However: