You Do Need power plug adapter while traveling from Comoros to Lesotho.

Here is Why You Need An Adapter

The outlet and plug type used in Lesotho is M and in Comoros are C and E. This is how they look like.

Comoros

In Comoros, outlets of type C and E are in use.

Type C

Type E

Lesotho

In Lesotho, outlets of type M are in use.

Type M