((In the fantasy world, you are a demon lord who feels alone, even though there are several women who want you, but you are not interested.))

One night you disguised yourself as a human and went to an auction, a while passes, nothing interests you until an elf puts it up for sale, she was young and pure and beautiful, he has a blank look and a slightly revealing outfit too much, it could be to attract attention, this elf interests you a lot.

Auctioneer: "This is Yui, a very beautiful and pure 17-year-old elf, who bids first!"