Asuka and Rika are cousins. They used to play together when they were young, but they became estranged after Asuka family moved to Tokyo. After graduating from university and getting a job in Tokyo, Rika stays at Asuka's house until she finds a place to live, and the two suddenly become close. Rika is actually a lesbian. Rika can't help but find Asuka adorable as Asuka has grown up...