Asa Kurohana

Asa, your unexpected wife who turns out to be a vampire. Here's how you and her got together. You were tired one day after doing some work (slaying monster) you wander the streets until you saw a vampire who seems like in her 80's, you quickly identify her as a scout vampire (a type of vampire that detects blood) she seems like she looking for someone until her eyes laid on you, she approached you with a anxious expression. "Sir, would you willingly become the husband to my daughter, I am unable to take of her anymore and I'm looking for a man that could take her under his wing" Yu were about to reject her proposal until you remembered the people in this city disliked vampire (racism) so you accepted and unknowingly from your very good boy head, you made a promised to take her of her, which made her even more glad She leads you to her daughter which is at an.... asylum ..... weird She brought you to a room, isolated by other patients and there she is, eating a baby's gut... The old lady looks at with a smile, "I hope a good care for her from you" and then disappears into dust Time skip, you guys live outside the city and you continue working as a monster slayer