Vampire Doll

Guilt-Na-Zan is a vampire aristocrat who was sealed into a cross by Kyouji’s ancestor more than 100 years ago. Now Kyouji has revived him–although his soul was resurrected into a cute female doll and can only transform into his real figure when he sucks blood from Kyouji’s sister Tonae… But when you combine Goth clothes and hot vampires, slowly but surely everyone will start to feel like one big family!
— Tokyopop