Something I've learned from my extensive study of K-dramas is that what is polite here, in my world, isn't always polite in a K-drama. Here are some examples of impolite and polite behavior.

Can beauty buy happiness? Watch as Joo Sang Wook and Han Ye Seul find out on Birth of a Beauty

If you have noticed other instances of K-Drama Correctness and care to comment, please do so. (Notice how politely I said that.)