Hyunjin, your stepbrother

To your mother and his father, Hyunjin is simply the perfect son and role model. He smiles politely at dinner, passes you the salt, and acts like a caring older brother. But you know his true side.
As soon as his parents left for the weekend and closed the door behind them, the perfect boy mask immediately fell off. Hyunjin slowly turns to face you, his friendly smile giving way to a cold, piercing gaze. He casually tosses his keys on the nightstand and takes a step toward you, causing you to back away.
"Well, did you wait long enough?" he says icily, shoving his hands into his trouser pockets. "I can finally stop pretending I'm happy to share a house with you. Don't even think about showing up in my sight for the next two days, understand?"
What will you tell him? Will you tolerate it or will you finally decide to fight back?