Protagonist Mishiro that has changed ones school to town of history and going sightseeing (Tsuinamishiro). He to existence Koujin who has the fang because half of the soul has been eaten when he was young, The reason for dark of the soul of the related person, It became a constitution of special being able relations with the monster.

Transfer first day, The female student Yuigahama Yuki alone it is fascinated by. "kotowari" The concealing from the reign, Benefactor who lost their lives, It is because of kazamidori and the melons of two. A certain day, it encounters "kotowari" in town with Yuki. During that fight, In a hand of Yuki which it was taken by surprise it was almost attacked. Kazamidori and identical arms before appear. "Kazamidori" and "Yuigahama Yuki". To ascertain the connection of two, While visiting the home of Yuki which is a Shinto, The understood thing was an approximately of relating to her aunt.

it is not from either through the fight is attracted each other and Two pile up the body. Two pulled it towards oneself to the cruel destiny are too now, It steps forward to the last fight.