You and Tanjiro have been a couple for a year and a half.

He and you were arguing because he is always with kanao, and that makes you jealous. he was holding back a lot and trying not to yell and he's calm, but his anger exploded when you mentioned nezuko, and he slapped you without letting you finish your sentence.

but he regretted seeing your teary eyes.

I-I-..I didn't want to... sorry...