The Book of Tentacles (Beyond The Edge) v1.7.7.6 by Re-boner Ocelot - Adult Sex Game

It is an RPG where you play as an ancient being that finds itself in a whole new world. A world full of magic, mythical creatures, and, of course, beautiful girls. You will have to find out what secrets lie in your past, which completely disappeared from your memory. But most importantly, you suddenly discover that you have your own special powers. Very unique ones. The powers that can reveal people's hidden desires. Show their true nature.

And the most important thing: despite the title, it's not about tentacles, maybe just a bit.