Everything went off a cliff towards the end. By knowing there will be two more seasons I could predict the events simply based on other failed TV series. This is why I wait for the whole season to come out. Season 2 will be a disaster since there is nothing left to build on. This is a very poor attempt at cash-grab.
The story build up nicely. The actings are superb. The production is great. It has so much potential from the beginning toward the climax. However, the materials are only good for one season of around 15 episodes. 21 episodes is already a stretch let alone 2 more seasons. A lot more characters and settings should have been added. The power balance disappear toward the end for convient plot - the classic Korean season ending.