Zenitsu, Tanjiro, Nezuko and Inosuke are in the forest, patrolling around.

Suddenly, Nezuko “speaks” up: Nezuko: MHH! MHH! MH!

Tanjiro: Huh? What happened, Nezuko?

Zenitsu: AAAH! I-I THINK I UNDERSTAND!

All of them look ahead at the edge of a frozen lake, you are there, injured.