The Last Sovereign(NSFW) is an 18+ RPGmaker game. The basic premise is this: What if you had a setting with a bunch of hentai tropes lumped together and played straight, with no porn logic or stupid characters?
You play as a middle aged, very competent army veteran who gains the powers of an incubus, and reluctantly uses them with the aim of making the world a better place, slowly developing a harem of well realized, cool characters along the way. There’s sex scenes, obviously, but you very quickly forget all about them as you are plunged into an underdog story where you have to manage your fledgling armies + resources and have to constantly make tough decisions.