Masochistic Elves from Another World!

Right now, in a dimension an unknowable distance away, an Elven Princess, Farina, faces off against a Dark Elf, Riza, in front of the sacred tree that all elves draw their strength from. Riza has an ace up her sleeve; she sends Farina to a world without a sacred tree to draw power from. Our world! Luckily for Farina, she ends up in the bedroom of the greatest power source in all the multiverses; our horny elf-loving protagonist!