
Not concern more like pity and miscalculation of situation in his part . It feel weird if he feel suddenly feel more concern. There is no sign of emotional development between the both character yet. Also mc stated in last chapter that first time he feel the little gentleness from someone and he named it as love.

Wait for the translation. Spoiler
According to what I was able to translate, the MC was injured and underwent surgery but didn't regain consciousness due to psychological issues. Upon hearing of this, the ML sent his staff to investigate the accident and with his friend, who is a prosecutor. He later knows that the MC has woken up and wants to go visit him, but when he does, he runs into the MC's older brother.
It's hard to like to the ML when he justifies his concern because MC's his friend and they had a "physical" attachment, and that a stone has more expressions than the ML.

Yeah I got that too. I think he’s feeling apprehensive about the whole thing but he’s not feeling actual regret or concern over that matter.. more like it’s a nuisance he just wants cleared or at least he doesn’t realize it yet
Yigon is definitely overcompensating and I think his codependency will be explored if he wakes up next episode.
Also I fear Hakyung will blurt out the truth that he knows their relationship is fake lol

Well he also lack basic concern. Mostly i understand in contract genre it's ok if both party ignore each other maintaining the basic decency. But this one the contract is not fairly made. Ml has more control and benefit and he lack basic decency .
I found it weird that audience is waiting that ml will regret his decision but like he don't has feeling for him , it's just business deal for him. I also don't understand his brother sudden move regarding the accident. If you see the truck I think the company name is written on it.

Exactly, he's in denial mode, he thinks he only sees the situation as an annoyance he needs to clear up, but at the beginning of the relationship he has shown signs of obsession, but since MC has been very dependent it's difficult to realize. He despises the MC and that same thing leads him to deny any feelings. The reason why I expect a repentance arc is not because I want him to realize he has feelings but that Yigon is a better person than him and he took advantage of an innocent person, but I doubt that will happen.
Spoiler.
No sign of mc in next chapter. Finally ml and mc brother encounter happen but no conversation between them yet. Pacing is too slow.