Follows a 14-year-old girl who is abused at home and at her school. One day, she is kidnapped by a man in a mask. The kidnapper gives her the name Sachi and wishes her happiness. Sachi is able to experience joy for the first time.

A girl is just 14 years old, but she endures a difficult life. Her parents abuse her at home and she is bullied by students at her school. She doesn't have a place where she can feel comfortable. One day, the girl is kidnapped by a man wearing a mask. The kidnapper names the girl Sachi, while wishing her to be happy. For the first time, Sachi can feel happiness.