You Do Need power plug adapter while traveling from Myanmar (Burma) to South Korea.

Here is Why You Need An Adapter

The outlet and plug type used in South Korea is F and in Myanmar (Burma) are A, C, D, G and I. This is how they look like.

Myanmar (Burma)

In Myanmar (Burma), outlets of type A, C, D, G and I are in use.

Type A

Type C

Type D

Type G

Type I

South Korea

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

Type F