叔母穴～オーバーホール～

NSFW

Developers: Kuro HinaSilver Bullet Co., Ltd.

Languages: ja

Genres: ADVMultiple EndingsLate Branching PlotFemale Protagonist for a Short TimeNaked SpritesProtagonist with a SpriteProtagonist with a Face

Themes: Male ProtagonistOnly a Single HeroineUnder the Same RoofProtagonist's Aunt as a HeroineOffice Lady HeroineHeroine with Garter BeltOnly Adult HeroinesOnly Older HeroinesOnly Blood-related Heroines

VNDB

Yuya lives with his father and mother. He enjoys his life with Kazuki, his close friend. But one day, Yuya sees his mother, Mizuho, and Kazuki having sex.... Days later, Chihiro, Mizuho's younger sister, visits his house. His evil desire arises and puts some medicine into a coffee he has just served to her.... [From ErogeShop]