I cannot really explain in words how enchanted I was , throughout the series !
There are so many real world messages portrayed beautifully through this fantasy drama. Messages like :

Flowers do not bloom on smooth asphalt paths , they do in mud and dirt.
Help those , who reach out for your help !
Do what you want to do , along with the things you don't want to do .
World treats differently to different people .
Poverty is not the only pain !
Happiness cannot be measured by success .

and many more ....
This was my first musical drama , and i really felt connected to all the emotions that were paved through music . i dint want to skip a second even after the language barrier . The songs are so well written and most of them are sung by the original cast , which makes it even more connecting !
For once I could connect with each character and none felt annoying . The 3 main characters were astounding , and stood well in their places . Performance wise I feel they all did well !

Ji changWook was an epitome of elegance and mystery as a magician who wasnt understood by the world , probably because he was someone who wasnt successful in the eyes of the people ! He wanted to be happy and help others , when they cry out for help ! He went under the skin of the character . He was this sweet innocent kid at one instance , an elegant magician at another and a crazy man at yet another !! He has undefined charms which no other actor can compare .

Hwang in yeop was a perfect high schooler , with good grades and amazing looks ! But he felt short of happiness , along the path he was following ! He portrayed someone who was in search of love and happiness , someone whom the world considers perfect and lucky , but who is hurting deep inside to be imprisoned and not to be able to find is own way .

Choi Sung Eun was a poverty striken girl working hard to keep the ends meet ! At first she felt pathetic of her situation , but gradually she accepted it , and learned to walk a happy path along it ! A read few reviews saying she was not speaking up , but i think that was totally understandable , she was a poor girl with nobody to take care off , she wss just scared ! I think she played it really very well !

All the side characters did exceptionally well too !
I feel sad when people try to find logic in fantasy ! Guys this is tagged as fantasy for a reason . This drama almost answers all the open question , while few are left for the viewers imagination , which is what a fantasy does , as everyone's fantasy and imaginations and the way to perceive things are different ! Specially questions like was he a real magician ? According to me he wasnt , as Ah-yi also said that he could not take her out of her situation but he tried to do his best to cheer her up !

It dint let me down for a moment , so here I am giving it a 10/10 . Enjoy :)