Why do tu think Toji didnt tell momo that sae had pictures of her through a text o something? instead of totally blowing her off.

He probably didn't want to hurt her más

Being the sweet held back guy in the story Toji had to make her belive the lie that he was going out with Sae. o he would gone through even más pain seeing Momo feeling sorry for him like it was all because of her. He was just too in amor to handle that.

i think that toji about momo plus he felt insecure and amargo, amargos also jealous toward kari