Hana Himeru Kimi no Meteor

Every hundred years, the Monster's Bride is chosen—a sacrifice given to the demonic creature confined somewhere within the country. When Stella's sister is chosen, she volunteers to go in her place. Stella is soon sent to be the bride of the blood-soaked vampire Lavi. But behind the blood and fangs, Stella finds this monster harbors a deep loneliness. Will her affections pull him out of his deadly despair, or is their love cursed from the start? (Source: Seven Seas Entertainment)