
So here's my theory, I think Seungho really knows who the fuck took Nakyum. BUT he wants to make sure about it, and Nakyum made it very clear because Seungho knew how much the Orange guy threaten Nakyum everytime. PLUS when he asked Nakyum if why did he ran away, he just want to like make an excuse to stop liking Nakyum because he was very scared that if they'll continue their relationship, Nakyum will always be in danger like kidnapping and killing him. He was afraid that at last, he found his weakness. He was never touched like Nakyum did while they're making love, as it shows in the first two panels. So in short, he wants to reject his feelings but not because he don't really love Nakyum, but it will make both of them in danger. We still don't have any idea who his father is and what will he do if he found out about his son's relationship to Nakyum.

Hi, this won't take long. This is like my POV of defining Chowon's character, basically my assumption. Chowon's character was introduced when Heesoo and Dojun (is it?? or dojin??) relationship is starting. Like from any Love story, there is always an Ex who will come back and tries to get their past lover, So is Chowon. We barely know him from the start, and his character started to shows by being an antagonist, basically started our hatred towards him. But now, starting from the special chapters about them, we can clearly see that he was just like any other characters. His POV illustrates what was him before his relationship with Dojun, right? Like the granpa and violin thing that started to become someone who he wanted chowon to be. Chowon thought that having a power to possess something is the source of his contentment. And then Dojun came. Chowon thought that "Possessing" Dojun will make him feel content about his life, but he started to show his tdark side which is being possessive, and obviously their relationship was ended because of him. The reason, I think, is chowon thought that Dojun will try to comeback to him. That's how his planning to do, but it didn't work. He's still trying by scaring people around him so he will get the attention he wants from Dojun.
I'm just going to repeat this from the comment I replied:
it was only an accident, that's why they said that they were in a lot of troubles before because of that accident. Chowon didn't really want to hurt anybody, he didn't throw hands to someone, he just scares them away. It can be a psychological disorder when a person was very possessive when they receive something or have someone who they think belongs to them. It's like a yandere style in japanese where a yandere character can hurt someone from jealousy (cos its a very strong emotion for them to handle)

to add up, about his relationship with kyungsoo, remember that chowon tries to give to kyungsoo his first ever possession that is very special to him?? it seems like kyung soo is very big help for his recovery and this chapter will also help chowon to change himself for the better. Chowon deserve a better and happy ending. He was been a lot of struggles from himself and I will love him forever.
i swear to my beautiful ass men, that mf is so ugly inside and out. He's driving me crazy like a mf