Matsuzaki Hatori is a female high school student who has a crush on her childhood friend, Terasaka Rita. She believes her life is like a shojo manga and Rita will eventually choose her as his heroine. However, Rita begins dating Adachi Miho, a nerdy girl in their classroom. Even though Rita dated before, Hatori feels that Rita really likes Miho and it is the first time Hatori feels threatened by Rita's girl. Because of Hatori's jealousy, the most popular playboy student, Hiromitsu Kosuke, takes an interest in Hatori.