By sheer luck, the demon queen manages to rescue Haru, a juvenile human on the verge of being auctioned off as a slave. In return, she enlists him as her aide and returns with him to their domain. Time passes and now the dashing and matured Haru sets a dreary demon queen abuzz when she inquires about anything else she may partake in. "Marriage," Haru eagerly responds. Follow the passionate and humorous love story of a pure-hearted demon queen and her faithful attendant.