On a small hill located on the outskirts of Ibushi-chou stands the Shirogane Shrine. It is owned by the Hisakawa family, who take care of two girls… or rather, one girl and one trap. Yuki is a boyish maiden who is very popular among the students at Akishino Central School. Tsubasa is cute enough to be granted entrance to the girl’s school as an exception. They have been together since they were kids, so one can never find one without the other. Despite their genders, they sleep in the same room and play together. Even though Tsubasa viewed Yuki as being more than a friend, he would not let their relationship go beyond that.
One day, while they were walking home, they came upon a starving miko Sarasa. She told them she was an exorcist who was chasing after a powerful apparition called the ‘maou’. Since there was a high possibility that the maou would infiltrate the school, she temporarily stayed at the shrine with them. She had Yuki’s full support since she wanted a change from everyday boring life. When Sarasa found out that there were students (including Yuki’s friends) who were possessed by other powerful apparitions at the school, she asked for Yuki’s help. Yuki gladly obliged since she loves bishoujos, and she even has a special ability which no one knows about.