To survive as a villain in a BL manhwa, you have to be strategic. Understand the weaknesses of the heroes and exploit them. Also, build alliances when it suits you, but be ready to betray them if necessary.
Surviving in chapter 3 of the manhwa as a player requires a combination of things. First, know your character's strengths and weaknesses. Second, use the environment to your advantage. And third, don't act rashly; think before making any big moves.