"Dumbass I said maybe-!!"
And even if it was unintentional, Katsuki had focused like-100% of his attention on Kiri's neck. He licked his lips, like fucking 3 milliseconds from biting Kirishima's neck-
...Y'know how I said he was gonna bite Kiri's neck in like-3 milliseconds? Yeah, um-he had inserted his fangs into his neck, first lightly biting it at first before fucking like-CHOWING DOWN ON HIS NECK-look, imagine my dog chowing down cold-ass chicken from my fridge...actually-don't think of that-just-POINT BEING IS THAT HE WAS ABOUTSLTLY DEVOURING HIS NECK-his biting slowly became sucking, and holy shit did that hurt even worse than the biting-it felt like..a bee stinging him, but like..100 times worse.