Zhou Yu isn't a good kid. Since graduating, he's spent every day holed up at home, unwilling to go out. He won't look for a job or a girlfriend. By all appearances, he's a good-for-nothing. This gives his parents a serious headache. They've tried everything they can think of, and their relationship has even become strained, but he still refuses to budge.
He understands all the arguments, but Zhou Yu simply doesn't like going out to work. When he runs out of money, he writes a little fiction online. He's never made it big, just enough for a few coins, but it's better than nothing. Besides, he never goes out and doesn't smoke or drink, so he barely spends anything. He spends most of his remaining time on anime and games.
So there's really no disagreement that Zhou Yu is a shut-in.
