Kichiku: Haha Shimai Choukyou Nikki

Already on shaky ground with father away on indefinite overseas work, the Nikaido household has mother Hitomi holding things together with her two daughters, Manami and Nao. Then a relative named Kinichi Itou shows up, supposedly to prep for college exams. He's charming enough on the surface, but it becomes clear pretty quickly that his reasons for moving in have nothing to do with studying. What follows is a dark, uncomfortable look at manipulation and coercion as Kinichi methodically exploits the trust of all three women in the household. This is a 3-episode OVA from Studio Gadget, and it does not soften its edges. The animation leans into the heavy atmosphere rather than working against it, and the character dynamics are genuinely unsettling in a way that feels intentional rather than careless. If you've watched something like Discipline or Bible Black and appreciated how they built tension through power imbalance and psychological control, this sits in similar territory. It's not comfortable viewing, and that's kind of the point. The Nikaido family feels vulnerable in a way that makes Kinichi's presence genuinely threatening rather than cartoonish. If you're someone who gravitates toward darker hentai narratives with actual setup and character stakes rather than just scene-to-scene content, this one has enough story structure to keep you invested across its runtime.