Controlling Beasts and Cultivating Immortals (ISBN: 1064777)
Well, this is a fantasy book, not a fairy tale. There is a portal on it, just click on it.
When a man falls into an elf's nest full of plump buttocks and breasts, and a dark elf's nest that has always been famous for its lewdness and obscenity, whether he should protect himself first or push back first, that's the question!