Well, koreans, like japanese people, are productive, challengers, winners, do their best till over the normal human race. I still remember a guy in tokyo, playing a musical game. He used special mode, the game speed was so fast i was barely able to see which button color was coming O_O
Well this guy spent last 3 months, playing most of the day every day with it, he's a champion of his area, won some money and stuff manga related, too. So, the hope is to be a champion, and find a work as pro gamer. Like i sais before, videogames are a religion in korea.
On other side, both parents are mostly workers, grandma is the nanny for most of their early age, so obiouvsly they grow up free. They go to school, with a high proficient level, but when at home, they need their videogame session. And sometimes, because they need to complete schoolwork and chores, they end up after dinner with some time for videogames.
So, if i explained clearly their attitude, it's time to work and be a champion. 9 pm. I can do better. 11 pm. I'm a semi pro. 6 am. 2 hours sleeping. Take a train, semi-sleeping few more. Go to school. That's their life, parents are working. Grandma is an old woman, sleepy. Only way to stop this system is put an end. From source.