有血缘关系的姐弟俩趁父母不在家时偷偷发生关系，目睹一切的妹妹发情加入逆3P后宫，与松本一花森日向子近亲结婚

血緣關係的繼姐和弟弟在父母不在家時偷偷SEX，目睹一切的妹妹因此發情也一起參進去的逆3P後宮中出近親交配松本一香森日向子。。

有血緣關係的繼姊弟趁父母不在家偷偷發生性關係。目睹一切的妹妹發情，加入逆3P後宮，近親繁殖松本一香森日向子。

The step-sister and brother who are related by blood secretly had sex when their parents were not at home. The younger sister who witnessed everything got into heat and joined in the reverse 3P harem and inbred Matsumoto Ichika Mori Hyugako. .