Jung Hoyou is Jung Hoseok lil sister. Hoseok want Hoyou to marry with his friend, Kim SeokJin. But, Hoyou doesn't know that her husband is a Prince Vamp. The reasons Hoseok want his lil sister marry Jin is to protect her from Devil Vamp that hungry for thick blood, that make the Devil Vamp became strong and destroy all the Good Vamp. Hoyou has a thick blood, strong smell and pale body that make every Vamp became hungry just by looking at her. How Jin gonna do to pro