Hisami, female high school student with a history of not having a boyfriend. She develops a crush on Haru-kun at a school event, but due to a misunderstanding ends up dating his friend, Narushi. What’s more, Haru-kun begins dating Hisami’s friend, Izumi… One day, Izumi suggests that they all switch lovers for day. Even if it’s only for one day, Hisami gets to date Haru-kun! A very excited Hisami gets brought to a love hotel by Haru-kun!