S. Korean teacher earns $4M a year, but isn't proud of success

SEOUL -- He commutes in a chauffeured Mercedes, makes more than $4 million a year -- and he's an English teacher.

CBS News was with Kim at the school on a Saturday afternoon; he says studying on weekends is typical.

Kim appears on TV shows featuring "star teachers." His students say his teaching is more engaging -- and practical -- than most. And to show his human -- almost geeky -- side, he'll bust out the guitar.

"I was inspired about his lectures," says 22-year-old Seung Jun-Yang. Seung says a typical school day starts at 7 a.m. and kept him studying past 1 a.m.

But when asked what the long hours of schooling mean for students, Seung says, "Personally, I think, depression time."

Kim agreed.

"I'm not actually proud of my success," he says. "The other side of the coin is the inefficiency of Korean education."

While an international educational poll ranks Korean students at the top for academics, they're at the bottom for happiness. Kim is trying to change that.

"This is my favorite place to be, and I am happiest when I'm teaching," he says.

If we had to guess, going to the bank isn’t too bad, either.