The story tells about a lonely high school student April 1st who can see monsters and attract monster blood. He dreams of erasing his abilities and living a normal life. One day, he is attracted by a butterfly and steps into the mysterious space "ミセ", where he meets the charming and beautiful hostess Yuko. "I can fulfill any of your wishes, but you have to pay a corresponding amount of labor as a price." In order to fulfill his wish, April 1st starts working at "ミセ" and lets Yuko order him around. In the end, as the relationship with his classmates Hyakumeki and Kyuuken Aoi deepens, they also encounter troublesome people and get involved in an unimaginable event--!