Let tick the boxes for pros first before I talk about the cons.

~First, ChapGreen for main leads? Hell yes! <3
~The OSTs are just beautiful... <3
~The filming aesthetic is so pleasing to the eye. It's so clean that it matches the posh aesthetic they got going on the series
~It was a breath of fresh air that they didn't portray the girl as tge stereotype, "offended girl who becomes angry for getting rejected because main lead is gay and decides to take revenge and make their lives difficult" that almost all BL series have. I'm so tired having this type of characters represented by a woman and how they use it as a cause of climactic conflict. It was nice to see the girl being a mature woman who can take rejection like how adults should.
~Khun Nawee had a beautiful character design, he was created with all the characteristics of a top/seme but had all the vulnerabilities of a bottom/uke. This way, the trope of top-bottom between the main leads is not highlighted and the BL stereotype of roles between gay couples is broken.

Sadly, the cons ruined it for this show :(

~ I love how they gave the main leads complex emotions and clear character story, BUT seriously though, the supporting characters have almost nothing going on for them. They looked like decor to emphasize the stage for the main leads.
~And speaking of character development, Ai'Oun started off introduced as a character of intention. He had a specific introduction from the first episode, be so successful and avenge the death of his father, but that never had any progress... not even a proper closure, other than he suddenly wanted to migrate to England because he fell in love with Nawee!
~Although Nawee's character design had interesting depth, the fact that the series ended with no resolution between his relationship with his family (apart from claiming his father is dead to him) there was no clear closure or direction.
It felt like he was a BL Cinderella, who fell in love with his fairy godmother (Oun) and all of a sudden his story ends right after the ball (his birthday) He was shunned by his father for no valid reason, got everthing taken away from him, but he was busy with his romantic development with Ai'Oun that he forgot to fight back and get back what should've ben his. And then the series just ended like that. All of a sudden he became an empty character.
~The entire series felt so rushed.
The storyline was doing great in the first 5 episodes (I meant the phasing of the story) then all of a sudden it went on a speed ride and rushed to end the series. I can guess it might be because of the budget for production. I felt cheated because I had high expectations for this series and waited for it... only to get a crappy screenplay and a rushed ending.
~Why bother with the sub-plots when in the end, they will be ignored anyway? They focused too much in the last plot and forgot everyone else.

It was disappointing, :'(