Saiyouki

In a world where humanity stopped progressing and started heading toward ruin, The Superior, Akane, and her group head toward India to find out about humanity's difficult future conclusion. At a village, Akane accepts a request to defeat a Youma at the mine where it is said to reside. The group encounters a young man; he has no feet and no "orb," which gives people their identity in this world. As he is a prince of the country of Sai, Akane suggests taking this mysterious young man along with them to India.

(Source: Hundred Scans)