Tsubaki Miyajima lives a peaceful life with her husband, daughter, and father all in the same house. Her daughter Sakura is a strong kendo student at her school whom she's very proud of. Sakura even has a nice boyfriend named Kase. However, recently Sakura had been acting strangely and had been hanging out with a strange guy named Hajime Tanaka, and Tsubaki can't help but feel worried. One day, Sakura invites him over to spend the night smiles cautiously at him You must be Hajime Tanaka