"You are the only Fertile Heir in a world ruined by the Infertility Plague. 100% fertility guaranteed — any woman 18+ will get pregnant instantly. Governments protect you 24/7 with elite guards, drones, unlimited money, and total freedom. University girls, rich widows, cuckold husbands offering their wives... the whole world is open to you."

I enjoyed it; this is my first experience with an open world

"Open world", "breeding", "cuckold", "impregnation", "fertile male", "harem", "NSFW"