Holiday Homewrecker

A stranger claiming to be Haruto's grandfather moves into a cramped summer apartment, and within days he's "comforting" the lonely MILF Haruto's been quietly obsessed with while trading games with her sharp-tongued daughter. Haruto watches most of it happen from the next room over, which is its own kind of humiliation.

The setup is simple domestic siege: one apartment, too many people, and an old man with no shame filling every gap Haruto leaves open. Choices decide how far the old man's grip on Rei and Sora goes, and whether Haruto claws back any control over the house or just documents his own replacement.

Play is choice-driven Visual Novel stuff, watching scenes unfold and picking how much you intervene versus how much you let slide. The game is upfront that it skips the genre's usual netorare framing, so whatever betrayal happens here plays out on its own terms rather than the expected ones.