Hime-sama wa Oazukedesu

Barbarus, is a half-human, half-vampire known as a “Varf,” and is literally “invincible.” However, the Varf are looked down upon as low status, and their clan is persecuted. One day, Barbarus succeeds in capturing Princess Regina, after the vampire king Dracul announced that whoever captured her would be granted “unparalleled glory for himself and his clan.” Barbarus attempts to bring the princess to King Dracul to earn the reward, but upon seeing her, his appetite becomes uncontrollable—!?

(Source: Ura Sunday, translated)