I Was Summoned to Another World Where I Got a Rare "Adults Only" Skill! Let the Fun Begin!

Summoned to another world to stop the Demon Lord, the protagonist is granted an impossibly broken SSR skill: [Alter World 18+]. This ultimate ability allows him to copy any target’s skills by “conquering” them-and if things go south, he can loop back in time to the very beginning as many times as he wants! Conquering a person……? ‘18+’…? It’s just like a dating sim! A super horny one! Under the guise of saving the world, his relentless quest to build the ultimate harem begins!