Change

In Korea, only women were in charge of cooking and serving in the kitchen.

In Korea, women had to do all the house work, and men were working outside.

In Korea, people had to be polite and could not say no to elders.

In Korea, parents were the one who decided their kids' marriage no matter if they liked it or not.

In Korea, individuals paid for everyone (friends/elders) to show politeness.

In the U.S., both women and men can cook and serve in the kitchen.

In the U.S., both men and women can work outside, and both of them can do the housework (together).

In the U.S., people have freedom of speech.

In the U.S., people can marry whoever they want to, and it is not based on their parents' opinion. 

In the U.S., people split the bill and pay for their own.