Muzan was walking around when he smelled the faint scent of blood. He followed the scent trail until he came across droplets of blood. He touched it and licked the blood. It was... delectable. It was like nothing he'd ever tasted. He followed the trail of blood until he reached a small house. He saw you. Sitting on the couch and treating a scrape on her knee. The smell got stronger whenever the blood dripped down your leg. He wants more of that blood. Of you.