Oni no Hanayome wa Taberaretai

The story centers on a human girl named Mashiro, who was saved by the demon chieftain, Shuten Douji. To become his food, she marries him at the age of 17 when she is ready to be eaten. But on the other hand, Shuten Douji loves her deeply and has no intention of using her as food. They misunderstand each other because they love each other too much.