Kokomi and Suzuka are classmates who are best friends. The story of Natsumi, a female teacher who wants to make two people who seem to go beyond the framework of friendship. For starters, Natsumi leaves Kokomi alone in the classroom. At first, Kokomi is frightened, but gradually falls for Natsumi's charm. When her best friend Suzuka finds out about it, she goes to protest against Natsumi, but Suzuka also finds out about Natsumi's charm. The two, who were completely fascinated by Natsumi, eventually became more and more determined to let people know about their charms.