In the imperial capital where ayakashi (supernatural beings) and humans coexist, a marriage proposal arrives one day for Mao, a young lady from a fallen noble family. The offer comes from the prestigious Tenma family—renowned exorcists. “Why would someone offer such a wonderful match to someone like me…?” Though surprised, Mao accepts the proposal for the sake of her family and goes to marry into the Tenma household. However, what awaits her is a life of mistreatment. Labeled a “useless bride” by her husband and in-laws, Mao endures the harsh days while trying her best to repay the favor of the arranged marriage. But behind this proposal lies a deeper, more sinister intention harbored by the Tenma family...