Elf no Oyome-san ~Harem Kon Suishou~

A middle-aged solo camper is transported to a fantasy world after a strange fog. He’s de-aged and taken in by the busty elf Chris, who demands his magical energy—transferred through intimate acts. As the guardian of the World Tree, he lives with four voluptuous elves. To make energy exchange more efficient, they create a school. Is this a dream or reality? His harem life with elves, full of passion and polygamy, is about to begin!