Astarotte's Toy

アスタロッテのおもちゃ！

In the demon realm of Ygvarland, ten-year-old succubus princess Astarotte Ygvar refuses the tradition that obliges a maturing succubus to assemble a harem of male attendants. To call her bluff, her retainers demand she include a human — a species long believed extinct — and produce Naoya Tōhara, a young man pulled into the demon world along with his small daughter Asuha. The two move into the palace and settle into an odd cohabitation with the stubborn princess.