Efferia is the world where the story of Magna Carta: Tears of Blood takes place. It is a continent that is populated by two races: the Humans and the Yason.
The humans migrated from their country of origin by sailing across the sea to the land inhabited by the Yason. The humans called the land Efferia, and created four nations: Garute, Maracatte, Bayer, and Amabat. The Yason live in the territory known as Yason-Roven.