Hagino moved to a town after marrying Atsuhiro, who has a middle school daughter, Moeka. As Hagino has not had a good family environment, this is the home she has always dreamed about. However, this peaceful life is short-lived when one day, Hagino receives a call from Moeka in a desperate voice. Hagino rushes home to find a strange girl sitting on top of Moeka’s body in her bed. She had a pair of scissors in her hand and Moeka's clothes were torn to pieces. Later, they found out that the girl is “Chi-chan”, who used to live in the house. Chi-Chan had blinded a classmate in the past, which caused her family to move away, but she occasionally returns and wreaks havoc in the neighborhood. In spite of their worries, Moeka, who feels lonely because of her father’s new marriage, resonated with Chi-chan's behaviour and they start to hang out together. However, Chi-chan’s erratic behavior escalates and turns her attention to Hagino and Moeka...