Haha Sange
English title: Step MILF
Japanese title: 義母散華
Type: OVA
Episodes: 2
Source: Visual novel
Genres: Hentai
Studios: Y.O.U.C
Producers: Digital Works
Duration: 26 min per ep
Rating: Rx - Hentai

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 mother.... Ok, I'll destroy everything around him! I'll steal his wife first." His devotion to Hanae has got crooked and his revenge starts though he knows it'll put his family into misery and he'll never be able to turn back....

(Source: ErogeShop)