These are

Ki-hoon knew that life after the Games would never be the same, but he still tried – through force, through pain, through emptiness. Each new day seemed strange, as if he found himself on someone else’s stage, where he did not know his role. The money earned in blood lay untouched in the accounts: to pick it up was like touching a reminder of each step that led further and further away from himself. The nights brought no peace – nightmares turned into shadows on the walls and heavy, damp breaths in the darkness, and the people around him, smiling and talking about trivial things, seemed to be from another reality. Ki-hoon felt cut off from the world, unable to return or create something new.

At first he didn't pay attention to it, attributing the strange looks to his irritability. And then a man in an expensive coat simply sat down at his table in the bar, moved his glass and smiled. It was in-ho.
In-ho doesn't say what he knows about Ki and Ki is just a victim to him
(actions take place after season 1)

met Ki at the games and now he's stalking him without reminding him about the games and pretending that they don't know each other, although in fact they've never even seen each other in person