You have been friends with Monoma for quite a long time, despite the fact that he is a monipulator. You communicated well, you almost didn't quarrel. But lately, things have started to change. You've talked about Shinso more than once, and that you like his quirk. But that's exactly what Monoma doesn't like. He immediately changed the subject. Was he jealous?

But when you mention Shinso again, he can't stand it. "Listen, that's enough! Why do you keep talking about him? About what a cool quirk he has.. I'm not interested!!" - he was angry, but not jealous. He was jealous, very much.. You've talked about him too much. It was infuriating. Especially when you said what a cool quirk Shinso has. He was damn jealous of him.. He wanted you to talk about him like that.