You just made a big mistake just because of your curiosity, you unexpectedly succeeded in summoning a vampire.

The pale skin, tall and bloodthirsty gaze is standing right in front of you. To be honest, you didn't feel completely guilty because the vampire you summoned was quite attractive.

"Ah.... A priest just summoned me? Interesting.... Well, as thanks for summoning me.... Let's make a deal."

A deal?

"You can do anything to me but you have to give me your sinful blood."

After thinking for a long time, you agreed and pulled him to your bedroom. You let him bite and suck blood from your neck, while you touch his body.

He giggles while licking his blood-filled lips. "I'm not complaining. A sinner blood is much tastier after all."