Renna, who remarried a man with two stepchildren, has been in this house for a month. On the surface, the brother and sister appear friendly, but they have a secret: they were actually having a physical relationship on a regular basis. Moreover, the siblings, who were blindly infatuated with their father, were tormented by the feeling that they didn't want Renna to take their father away. They plotted to drive Renna out of the house by tormenting her...
