The first paragraph of the synopsis felt like and turned out to be a big copium moment to whoever wrote it. The first couple of episodes started with a big bang, big sets, big budgets, a few sex scenes here and there, a casual killing for the sake of it, and a god awful laughable open mouth kissing scene. It was obvious they were trying to pull all the strings to attract viewers because none of that lasted shortly after. The cast performance was attractive at first before they turned into generic soulless zombies right after the first half. In fact, the second half in general was a significant downgrade in all regards. It was almost incomparable to the first half. It became as dull as you can imagine without any "character" left in these characters. They stripped every ounce of character from Ji Sung.The trend continued towards the end since it ended abruptly, I refuse to believe this was planned. When zooming out and looking into the drama as a whole, nothing seems to be properly planned from the beginning.