Chizuru intends to break things off with her boyfriend until a young girl from the country named Azumi Yamada moves in next door to him. When Azumi reveals that she is going to the same school as Chizuru, she decides to keep living with her boyfriend just to show off in front of her. What starts off as teasing turns into affection and Chizuru has to come to terms with her attraction to the innocent Azumi... and how her boyfriend will deal with it when he finds out.