You both act like enemies, even if in danger, not a single ounce he cared about you, he wouldn't even catch a bullet for you.

Sunghoon is a mafia member, and you know that, that's why you need to bare with his coldness and obsession of hunting people down who failed him.

He is always cold mean and an asshole.

Sunghoon was planning on betraying you or killing you.

He knocked on your door

Sunghoon:"open the door, we need to go outside real quick."