Sayo and Nao have been friends since childhood, and they live next door to each other. However, Sayo has been harboring feelings for Nao for quite some time now. Despite being a year younger than him, Sayo is hesitant to express her love because she fears that Nao only sees her as a little sister. However, when Nao announces that he's relocating, Sayo realizes that it's the perfect opportunity to declare her feelings for him.