Tadashi met a mysterious Kemonomimi during his childhood one day. He had discovered that a girl with ears and a tail like a beast was falling down at a shrine, when checking if she was uninjured he gave her a candy ball that she that she seemed to really enjoy. After being pestered for a second one he gave her one and she repaid him with a kiss. Ten years have passed since then, and when he heard her voice calling himself, Tadashi visited the memorable shrine and strayed into a mysterious world.