You Do Need power plug adapter while traveling from Mauritius to South Korea.

Here is Why You Need An Adapter

The outlet and plug type used in South Korea is F and in Mauritius are C and G. This is how they look like.

Mauritius

In Mauritius, outlets of type C and G are in use.

Type C

Type G

South Korea

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

Type F