I feel so sorry for Juhyeok. It all started with su-ah scenting him since they were younger, and Juhyeok obviously didn't feel that way to him, you can see it since they were kids, su-ah always had a crush on him, and Juhyeok saw su-ah as something to protect, this dynamic was ruined once su-ah was found an alpha and Juhyeok was found an omega, su-ah doesn't need juhyeok protection now, and I feel the core personality of juhyeok was being the protector, I don't think deep down he understands su-ah's feelings to him, probably he sees it as a childhood core feeling that slowly will fade away with time, but su-ah scenting him brought the chaos, it was without juhyeok consent, and su-ah was selfish to do that, you can't just make someone who doesn't have the same feelings for you to become dependent physically on you, it's not fair especially that juhyeok needs to be physically perfect for his competitions, juhyeok was slightly wrong about the way he handled this, but he had no choice because you know why? He doesn't see su-ah as a love interest!! He sees him as the clingy bestfriend from childhood and he doesn't want su-ah to think they have a chance to be together, because if so, he'd have just asked him to accompany him to japan but that would make things real! And that's NOT what juhyeok wants because HE'S NOT IN LOVE WITH SU-AH!! NOT YET!! all they have is physical codependency which su-ah is trying to exploit, I almost cried for juhyeok, as someone as ambitious as him, that is a freaking nightmare, you don't get it! Anyway let's prepare our hearts for the angst coming haha 
Well .. I'm here cause obviously I have no life .. hehe .. 