The guy who was found by Changjo was a god who brought spring. The village where the man who hit Changjo came from kidnapped him and kept him in their possession to, well, have spring. Yeonhwa ends up sacrificing himself to bring spring to them, and doing that, he leaves Changjo alone. If I remember correctly, there was something about Yeonhwa's blood bringing spring or something, which explains why in chapter 3, when he got a nosebleed, flowers started growing around him and Changjo. There is only 8 chapters and it's completed.