Thaumarotica is a game about discovering the secret occult truths that underlies reality, and eventually becoming a weird sex wizard. It draws from real world mystic sexual practices and a bunch of movies, books, and fictional sources on the topic.
The protagonist starts out as a bit neurotic with some weird sexual hang-ups, and through the course of the game will find himself exposed to strange and deviant lifestyles both mundane and paranormal, and tempted by things he didn't even know existed. How quickly he succumbs depends on the choices you make - will he overcome his sexual neurosis or will they push him into strange new forms of depravity?
Nice enough start for a VN. Art is good. It promises to be story led so all we have so far is the start to the story.