I liked that new guy's face, but the whole chapter made me like him less and less. He's sharp, so he knows what's going on, but keeps up this annoying sticky attitude. Then, after Kuroi is upfront with him, tells him off about sleeping with people that are taken, this is all this guy finds to ask?!
I'd get really pissed off by that.
Maybe he's fine with other partners, but he should know to back off here. It's so obvious the other party isn't interested in that. Shirakaba isn't hiding he hates his guts too. The fact this is probably also fueled by petty competitiveness gives me an even worse impression. He's being so rude for someone saying he likes and respects Kuroi.
Not to mention his habits in bed probably brought troubles before. Bet Kuroi got his scar trying to clean up his mess. Pretty sure that is what was hinted so far, anyway. So following his dick rather than his head once wasn't enough... Hope a harsh lesson is coming his way soon.