The reason I started this so late was the series being a serious one and not a fluffy or romcom one.

Story :
The story is nice, well put and properly scripted to cover most if not all small things.

Acting:
I have seen most of the leads in multiple series and believe that this is by far the best they have acted till now. Acting by Gun needs special appreciation.
In a couple of scenes, I think it could have been directed or scripted better as it was not properly matching with the characters, eg. after Sean confesses to Black, his dialogue seems too extreme for his character.
I would love to watch another series of Sing Harit Cheewagaroon who played the role of Tod, liked his acting and his physique.

Another thing I would like to mention is, the makeup/character's representation, Black/White could have been portrayed a bit more masculine and mature as his physique doesn't matches with someone who is a fighter. One of the starting scene of Gawin's eyeliner was too dark.

At times it feels very dumb and unrealistic that he switched places without knowing things about his twin.
Another thing I loved is the art shown and developed in the series.
But to be frank I don't see good chemistry between the leads.