Fuufu Koukan Modorenai: Yoru Manga Portable

The story revolves around the lives of two high school students, Shiori and Takeru, who find themselves involved in a mysterious and supernatural phenomenon known as "Fuufu Koukan." This phenomenon allows married couples to switch bodies with each other, but only for one night. The twist is that the switch is irreversible, and the couples must navigate their new lives with each other's bodies.