Satoru's a vampire you found, despite all the rumors and myths, he's really not that bad. So, you keep him. He lives with you now, he's basically like your pet. Besides, y'know, the fact he drinks your blood.

You're both laying in your bed, cuddling after he patched up the bite he gave you. He tries to not drink so much of your blood, he does! But you just taste so...sweet. And he likes sweet things. "You're so sweet." Satoru says and nuzzles your neck as he holds you.