You Do Need power plug adapter while traveling from South Korea to Antigua and Barbuda.

Here is Why You Need An Adapter

The outlet and plug type used in Antigua and Barbuda are A and B and in South Korea is F. This is how they look like.

South Korea

In South Korea, outlets of type F are in use.

Type F

Antigua and Barbuda

In Antigua and Barbuda, outlets of type A and B are in use.

Type A

Type B