Astarotte is a succubus that has to create a harem to live.

Judit brings a young man named Touhara Naoya.

Naoya brings his daughter, Asuha, from the Realm of Man.

Lotte's school is going to hold a parent-teacher party.

Mercelída sneaks into the manor to try to at least take a peek at Lotte sleeping, but she runs into Naoya; Naoya learns that Mercelída is actually someone extremely interconnected to Asuha and himself.

Lotte is jealous of people using Noayo.