Sixteen-year-old Yun Morokawa does not consider herself a "lovenista" or "love expert." While she falls in love often and easily, she is unable to maintain a relationship with any guy for long. For Yun, sex results in extreme pain, and none of her previous boyfriends have shown sympathy for her discomfort. Yun has had no reason to interact with Hiromichi Kondou, a juvenile delinquent and gang leader. However, a chance encounter one day leads to an honest conversation between them. Hiromichi reveals that he secretly aspires to become a make-up artist, and in return, she discloses her aversion to sex, which conflicts with her constant need to be in a relationship. Hiromichi suggests that Yun would experience pleasure rather than pain with the right sexual partner—and he offers his assistance to help her overcome her trauma.