In order to get back at an extroverted guy, an introverted girl established the "Masturbation Material Club", a club activity aimed at being used as masturbation material. The heroine of this work is a cool, big-breasted, introverted virgin who has a strong hostility towards extroverted boys.
*The main character is not very assertive and there are no lines with speech bubbles. Instead, the heroine talks and speaks a lot.