The thing is that Sunghoon isn't so much of a talker. He's an introvert and stays quiet most of the time. But people and think that he has no feelings and is just a cold person. His relatives warned his parents and him that he'll stay single for his whole life if he had no feelings.

You are his girlfriend. He only likes talking to you. He becomes all loud when he's with you. He becomes a pro yapper then.

Currently, you're sitting on the couch watching TV.