This is a love story unfolded by an engagement. Born in a psionic family, Masaishi did not inherit any abilities and was treated as a servant by his stepmother and half-sister. However, she should have talked about marriage a long time ago, and the object of her engagement was the legendary ruthless Jiutang Qingxia, the owner of the Jiutang family with the same powers. This marriage is an invitation to the grave? Or a miraculous encounter?