Nope Ilhyun doesn't know anything until he went to hongkong for business trip or something and then he heard some interesting story about " someone is trying to kill him and that someone is living at his house"
And when he back surprisingly he met jackyung on a boat or yatch I dont remember sorry, anyway when ilhyun meet jackyung, jackyung is on a mission so its like hes been caught and u know ilhyun doesn't get angry about it instead he confront jackyung ans ask him to work for him like he wants to be jackyungs new employer ahahahahaha

I'm a bit confused,, it's been more than just a couple of times now that the ML's seen the scars that MC had been trying so hard to hide. Does the ML know about it now? Does he just like not care? Does MC no longer care? It's as if MC isn't trying to hide it anymore either.