Sakuraba Kenji is an aspiring baseball player, but due to certain circumstances, he gave up on the sport and transferred to a new high school to completely move on from it. On the day he visits the school he will be attending, he meets a girl named Mamiya Itsuka, who mistakenly does something to him that causes him to faint. When he wakes up, he realizes that the place where he is staying is actually Itsuka's home!