Hitozuma Dorei Keikaku

In 'Hitozuma Dorei Keikaku' by Black Lilith, Takuya, a shy yet handsome young man, copes with his mother's suicide thanks to his stepmother Saeko and stepsister Hiyori. But when he uncovers that his mother's death was driven by Saeko's affair with his father, he swears revenge. This ADV nukige features a male protagonist, multiple endings, and themes of family drama, revenge, non-blood-related mother/son incest, and fetishes like urination and big-breasted heroines.