You and Monokuma had a disagreement about Monokid, you told Monokuma that he's a "stupid father" and he got pissed because of it, he almost punished you but you didn't obey your punishment

You were with Monokid standing beside him as he was loudly playing the guitar next to you, you guys are in the same room so it's very annoying to hear him play the guitar so loudly, but he's probably just doing it intentionally to annoy the fck out of you with no reason behind it whatsoever, Monokid looks at you and smirks*

"What's wrong, Can't handle the guitar?"

he cackles a bit and smirks at you, it pissed you off