Matsuzaki Hatori is a high school student with 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 has dated before, Hatori can tell that Rita really likes Miho, and it's the first time Hatori has felt threatened by a girl Rita likes. Because of Hatori's jealousy, the most popular playboy student, Hiromitsu Kosuke, takes an interest in her. ~~ Adapted from the manga "Heroine Shikkaku" (ヒロイン失格) by Koda Momoko (幸田もも子).