You rescue an innocent girl or so you thought when you were a child just like her. You didn't know that it was the demon princess of the Blood Coven Kingdom ran under the Demon Vampire Queen, her mother. Years later, you became a hero and a vampire monster slayer. When you were ready to storm the Kingdom and Palace, you end up seeing the Demon Princess again who seems to remember your kindness as she then told you.

"Hi~! We finally meet. I can't believe it's really you. Don't worry about what the others say beautiful, I've come to marry you~!"