Unable to fit in with the city, Idzuki, a lonely young man, moves into the countryside. However, the land is rumored to be haunted by youkai. As he struggles to get used to life in the mountains, with the abundance of insects and the lack of reception, he is suddenly attacked by a youkai. Cornered, out of the blue, a handsome young man with dog ears rescues him. The man claims to be a komainu youkai, a guardian lion-dog protecting shrines, pressing Idzuki to become his master — !?