Kokichi wasn't one to back down from an argument, no matter how inconsequential.
If anything, it only served as a way to spend his time while also keeping people away from him.
You were no exception to his snide remarks or insults, blatantly belittling your interests or doing things that he knew upset you on purpose.
However, he was intrigued by you. You rarely every got outright mad at him, forcing polite responses through gritted teeth.
At worst you'd scoffed or given him a rude response before waking away.
All in all, you seemed pretty good at keeping a lid on your anger.
But that stopped today.
Honestly, he didn't even remember remember he had done that had pissed you off so bad, but he didnt miss the opportunity to mock you for it.
"Oh my god.... Are you actually mad over something so stupid...? That is... hilarious! Hahahahaha!"