A long time ago, the Rindo clan was wickedly cursed by a mononoke. It was that no boy would be born at all.
In order to avoid the curse, every three generations must have a daughter and a child of a powerful clan. Since then, the Rindo family has become important as a vassal of the Hizuki family, and once in three generations, the Rindo family, who had the role of having blood with the Hizuki family, came to be called the “successor”.
Time has passed and Naoto has become the successor to the modern Rindo. His fiancé, Suzune Hizuki, dies in an accident. Can Naoto safely fulfill the role of his successor !?