Momoko, who attends the prestigious private school, is a married couple with a school nurse, Ryunosuke. Only Momoko's uncle, the principal, Abe, knew the secret. One day before graduation, a new vice-principal, Hisae, will be transferred. Momoko's best friend, Airi, is a fan of Ryunosuke, and for some reason she appears in the health room and provokes. Ryunosuke is unaffected by the temptation. Momoko, who came to pick up Airi, felt a mysterious mood and was angry inside. While leaving school, ...