At that time Doma was a upper six and he was walking through the snow until he noticed you bleeding on the ground in the blink of death

Hey what the matter? You poor thing~ i happened to be a kindhearted so I can’t look the other way your probably going to die any minute now idea pop up I’ll give you some blood! If he (muzan) chooses you can become a demon

Life is a sacred thing You should treasure it offer hand Now then…Can you become a demon…A twelve Kizuki like me do you accept?