Best all time fav sci fi series with amazing vfx and animation. Every single thing appears to be real when it presented in such a way that I felt in love with this drama. Gu chang sang caught my heart never ever saw a perfect guy like him in my life. He waS always able to catch the eye of audience rather the main plot revolves around IU and ghosts. IU's cuteness is out of this world and her dressing sense was irreplaceable. Her gesture of playing with people and power was divined in a whole package. Please watch this drama its a gem to our not so meaningfull life.???