As a young boy, Yusuke came home to find his mother having sex with another man. His parents soon divorced after; seeing his mother’s infidelity at a young age left Yusuke with hatred for not only his mother but for all women. Now, his father has remarried but is assigned to a distant office. Yusuke decides it is time to get his revenge on women through his new stepmother…

Stepmother’s Sin is a two episode mind-control hentai title that is surprisingly light on the fetish material and tries to have a moral to the story.