Kumiko is a widow who loves boys like no other. One day, Kumiko catches a boy playing on the street and takes him out with skillful language. Immerse yourself in…. From that incident, the hot days of superimposing the bodies of the boy and Kumiko began. The boy's brother, who has no idea that such a thing happened, wonders about the change in his brother's behavior. Then, one day, he was shocked to learn that his younger brother, who was still a good age, was poisoned by Kumiko, who lived nearby.