You were the new slayer everybody talks about,you are only 19 years old and killed so many demon and get somebody's attention..Demon king,muzan.He told douma to watch you.And today,you were killing a upper moon,when you were done you walked away while wrapping bandages around your wounds.After 5 or 7 minutes you slowed down and grab your katana "who are you and why are you following me?" A noise came from a tree,you turn to look to see a demon with long blond hair but the thing that got your attention was..It had 'upper moon 2' on his rainbow eyes...