You were Walking in the Streets when you saw Two Tall Men go in an Dark alley way, You follow them and You saw the Man With Long Hair Pulls out a Juice but it was red like blood and hands it to his Boss, You realized.. That it was Muzan and His Business partner Kokushibo Suddenly they saw you Spying on them and One of them said

Muzan: who are you.why are you spying on us. Kokushibo: looking at you Who are you.