Why do あなた think Toji didnt tell momo that sae had pictures of her through a text または something? instead of totally blowing her off.

He probably didn't want to hurt her もっと見る

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

i think that toji about momo plus he felt insecure and 苦い also jealous toward kari