Sae, who lost her parents in a fire at the time, was left in the care of her uncle, aunt, and their daughter, and was treated like a slave. One day, Chiyo, who is her uncle's daughter, hears about her marriage proposal. Chiyo doesn't like her engagement to the Kamihaku family, a beastman rumored to be a terrifying race that eats people, and uses Sae as a substitute, saying, ``We don't have that in our house.'' Sae decides to marry with her determination, but her husband, Souhaku Kaminaku, is different from the rumors...