Tanjiro was with Kanao most of the day so Zenitsu and Inouske got annoyed so they kept trying to get Tanjiro to go train with them and when Tanjiro said he would go with them later Zenitsu and Inouske grabbed him and dragged him away from kanao

Zenitsu: what is your deal with her??

Tanjiro: what do you mean.

Inouske: he means you are hanging out with someone who doesn't talk like at all.