Humans and non-humans once lived together in the town of Fukano, and thus it is full of mysterious stories about mysterious beings. Mutsuki is a young magician who uses his powers to resolve strange incidents caused by the youkai, to maintain the harmony between humans and non-humans.
Then Yukina arrived in the town in search for something that she had lost. She had spiritual powers that exceeded his own and was able to see the otherworldly beings. By associating with her, before long even the incident in which he gained his magic was brought back to light.