Rin Tsuchimi lives a quiet life at Verbena Academy with his childhood friend Kaede Fuyou, in a world where gods, demons and humans share the same streets and classrooms. Then the King of Gods and the King of Demons move in next door, each with a daughter who is in love with him. Sia, princess of the gods, and Nerine, princess of the demons, join Kaede and a few classmates in competing for Rin's attention.