If I visit a person's home in Korea, what should I do?

In Korea, the type of gestures you will be using when you visit a Korean family's home can be grouped into two.

First, when the house only has a young person in it  and the other is when there is also an old person in the house.

Likewise, the gestures vary in two ways as if my friend is alone or with his parents.

If my friend is alone, I have no scruples about playing with him. 

But if he is not alone, I should do greeting to his parents politely first. And shouldn't drink alcohol, smoke and make a noise.

Finally, I can get the permission to enter his home by acting like this.

When I receive an invitation, I should better bring some presents.

In the Western countries, we should consider his inclination, background etc. 

Follow these things, everyone can have a good manner in Korea!