Heaven’s Gate of Lust

Fresh out of university with nothing but free time, and then the world tilts sideways into something a lot less mundane. Angels, demons, and the tight-lipped Blind Ones all show up with agendas nobody explains, and the story leans on that mystery hard.

The plot follows a graduate pulled into a supernatural setup where the rules aren't stated up front. Angels are described as majestic, demons as treacherous, and the Blind Ones as flatly unreadable, which is about all you get before you're expected to start figuring things out yourself.

You work through it as a visual novel, reading through encounters with the women populating this hidden world, monster girl included, while piecing together why you're there. The game is still being built out chapter by chapter, so what's playable now is the opening stretch rather than a finished mystery.