Fukada, the owner of an old house, is going to live with two other ladies temporarily as he signed a contract with a film company, allowing them to use the house in a monster movie.

One of them is Kosame, a girl being a monster and superman otaku who would not give up the chance to live in a monster's house. Another one is Yuki, a young actress taking part in the movie who wants to understand the house more.

The story moves on to the developement of the special relation of the three and the exploration of the memories hidden inside the house.