A friend of mine showed me this JRPG on the internet a few weeks ago called "Violated Heroine". So I Googled it, and at first I thought, "ok, it's a fun 2D action RPG with a bit of fan service." It wasn't until after I played it for a while that I realized it was potentially the most perverted and vile things on the planet.
A lot of the images on Google make the game appear "work safe." This is actually a screenshot I took myself. To be fair, most of the sexual content you kind of have to go looking for intentionally to find, but it will sometimes find you as well. Either way, that's actually part of what makes it fun to play and adds some very unique features-- such as the ability to get your character pregnant, who will then give birth to children you can raise, some of which growing up into playable characters.
It's still kind of a work in progress, with updates that come along once in a while. There are a lot of interesting debug room options to play with, though much of it is not yet translated into English.