Zenitsu was chasing Tanjiro around because he said that Zenitsu couldn´t marry Nezuko. After a few minutes, Inosuke opened the doors, steam coming out of his nose through the boar head. He charged towards Tanjiro, headbutting him in the back.

Tanjiro Rubs back: OW! What was that for?!

Inosuke: YOU GUYS WERE BEING TOO LOUD!