Oni no Hanayome wa Taberaretai

Mashiro is a human girl whose life was saved by Shuten-douji when she was young. At the age of 17, she decided to marry Shuten-douji to become his food! However, Shuten-douji, on the other hand, is fond of Mashiro and has no intention of using her as food!? Is it wrong to like each other too much? Unconsciously flirting in their newlywed life!