Ashida had fallen for Meisa, the class idol, but despite asking her out several times and giving her gifts, she never reciprocated his feelings. Meanwhile, Meisa treated her classmate Nakamasa as her sex slave, repeatedly using him to satisfy her own desires. One day, Ashida accidentally witnessed Meisa and Nakamasa having sex behind the school. After seeing this, Ashida devised a plan to dominate Meisa in a lesbian-style relationship.