Surrounded by legends of the Japanese wolf since long ago, the town of Okamimura lies deep within the mountains. Members of the Mysterious Discovery Club along with KÅta, Rurumo, his classmates Nishino, Sugawara, Sakurai, Maya, and the student monitor trio take a train to Okamimura. Transforming herself into a human, Chiro tags along as Rurumo's younger sister. The Mysterious Discovery Club discovers a magic potion, which Senior gives KÅta for him to drink. The potion ends up transforming KÅta into a wolf, and he has to run for his life before he is hunted down by the inn's owners.