This was a great drama. The plot had alot of potential and was well written with a few loopholes although it was stable in the end. The end was a little confusing but sure was good. Im thinking there'd be a season 2 as the ending left off a clifhanger. It gave alot of Enigma( thai drama) vibes to me at some point of time. But was sure as hell good. The actors played their roles greatly and alot of the characters could not have died. I believe that Ko lying jun and Choi Mina had alot of potential compared to other characters and The end where they show that there were rumors abt Park Se Eun It felt like there was a huge loophole. And on addition to all of that the statue in the Youth center was Out of the box I feel. This drama isn't a horror drama it's more like a Sci-fi or Mystery drama as there really isn't no ghost so if anyone is gonna watch this drama please keep in mind that there is no ghost.