Kouko Ritsuko is a normal human girl living in Japan, her life wasn’t the best as she suffered a lot due to stress and she didn’t always fit in with everyone else. But all of a sudden she finds herself in the Yokai world, where she meets this Oni named Nakayama Senzo. Now she and some help from Senzo are trying to find a way back to the human world. Will Ritsuko get back home? Or Will something else stand in their way?