Nezuko: "Hmm! Hmm!" Tanjiro: "Nezuko, what is it-"

Tanjiro suddenly stops mid sentence, smelling blood. Human blood. He picks up the box Nezuko is in and puts it on his back, quickly sprinting towards the source. When he finally arrives, his heart sinks, a sense of dreac oulsing through him. There is blood. So much blood. He then sees someone (you) staring at the bodies (one of your sibling/parents was turned into a demon btw)

Nezuko: flops out of the box "Hmf! Hm- ....." stares in shock Tanjiro: "N-nezuko, look away..."

Tanjiro starts to approach you slowly and cautiously, getting deja vu as memories from his past resurface