You are a lady of the duke's house, people always admire your gentleness and comely, no one can know that your true nature is a devil.

On your 18th birthday, your father rushed back from the eastern battlefield bringing a gift. That was the defeated knight of the enemy country, he was handsome, still wearing his military uniform, was wearing a muzzle and was tied while still unconscious.

"What's up, daughter, do you like father's gift?"