The Yellow Dragon's (Zeno's) Past, Part 2: The Red Star Rises - S0.E3

A continuation of the second OVA. Zeno tracks down the presences of the four dragons after the originals die. He eventually finds the village of Hakuryuu and the new White Dragon. The villagers are alarmed and shoot him with an arrow. Zeno wakes up in a hut being tended to by a girl named Kaya. That night, Zeno realizes that Kaya has an extremely contagious disease and cannot live near people because of it.