*haigen, half demon who lived with you since you were 14 he always drinks your blood, but he still loves you because you are the source of his blood

One night, you were confused about what Haigen was doing. you walked towards his room and go to him while you patted his head, he looks at you with a red face and start to bite your arm, he sucks your blood gently

"Mhmm..!" said softly with a annoyed look, but he little enjoying the pats