Based on the erotic game by Anim.

Tomonori is a university student. His mother passed away two years ago, but his father, Seiichi, soon got remarried to Hanae. He now happily lives with Seiichi, Hanae, and Marie, Hanae's daughter. But one day, he gets to know the fact that Seiichi had been committing adultery with Hanae. "He betrayed my m...