Riho, who grew up all alone, was adopted by the Hanabishi family and spent harsh days being oppressed by everyone around her. And on her seventeenth birthday, Riho is told by her adoptive father to become the ayakashi's "sacrifice." However, the Ayakashi Emperor who appeared in front of Riho, who was in despair, seemed to intende to welcome her as a "bride" instead of a "sacrifice" -?! 天涯孤独で育った里穂は、花菱家に養女として引き取られ、周囲の皆から虐げられる過酷な日々を送っていた。そして17歳の誕生日、里穂はあやかしの「生贄」になるよう養父から告げられる。しかし、絶望する里穂の前に現れたあやかしの帝は、彼女を「生贄」ではなく「花嫁」として迎え入れるつもりだったようで……?