[ This is the first time Zenitsu's ever gotten seriously angry at Tanjiro, no matter what the circumstances were. This is also his very first friend and the latest crush. He's legit scared that Tanjiro probably hates him now.

Now that the initial yelling happened, he's now in his usual sets of tears. ]

Y-You know how we were all acting weird a few days ago? Tanjiro was acting super scary so I got mad and yelled at him!

[ CRY. Also that's not exactly fully explaining things, please hold... ]