Brilliant Concept and lovely execution . I won't say that its the best of the series , but its very satisfying and the loop holes get covered by the brilliant performances by the cast . The ending was just amazing ! I gave it a 10 on 10 coz I really enjoyed it a lot.

All the 4 main characters were phenomenal !
Song Dong ll - What a lovely portrayal of his character . He is an amazing character and the favourite ahjusshi of K-dramas !

Ji Chang Wook - Haven't seen a K-drama actor better than him ! He is just absolutely amazing , he can act only with his eyes . Every damn expression is so readable.

Choi Soo young - This is my first time watching her and she was a treat . This is called a strong female lead , not the annoying ones K-dramas usually have. She was a very loveable characters.

Won Ji An - She has a great reach as a performer , just like JCW . She acted crazy , emotional , broken and happy and was amazing with all her scenes.

So far the series I have seen , I can say that this series in one of the best in this genre !! Highly recommended .