The Yellow Dragon's (Zeno's) Past, Part 1: The Starting Dragon - S0.E2

This is the first of a two-part OVA surrounding Zeno's backstory which is not revealed in the main series. It starts out with the group having a drinking contest. Kija is quickly eliminated by Jae-ha as he wants to see who has the more powerful dragon limb. However, do to his low alcohol tolerance, he faints after having one drink.