After awakening in a new world a young man changes his life drastically by becoming a busty, lust craving succubus? Adventia, world of fantasy, where adventurer classes of all types live and thrive. Our intrepid hero acquires the Succubus class, transforming her into a carnal loving she-demon with a desire for all things erotic! In fact, to level he (I mean, she) must lewd! My Succubus System is a progressive fantasy isekai adventure with themes of sexual exploration.