"WH-"
He stumbled back, a whole sea of emotions/thoughts running through his head
R: "Now do you get it, Kirishima? Why do you think this dumbass was so moody? Huh?"
Ren then tried to pull his neck away, but all that caused was Katsuki to hiss at Ren, sucking on his neck even harder. He winced slightly before closing his left eye, still looking at Kirishima-ACTUALLY HOLY SHIT DUDE-