This is just my opinion but The Sign worked because they didn't try to super feminized Babe there but here it's…
hes literally playing the role of a traditional thai dancer which were mostly feminine which is why yai mistook him as a woman, its part of the story. That is the role here and I think he is doing a beautiful job with the dance. He looks stunning.
You stated more things that you didn't like and still gave it a 9.5? what about the story, character depth? its very flat. They barely communicate with each other and there is no character growth.
I want to offer a different perspective, if you don’t mind. Body language is part of the storytelling. In the…
They cut pretty much all the dialogue from the manga, there is no emotional progression except 2 kisses and a sudden breakup. They don't actually TALK things out. This is the scriptwriters fault. They are just as stubborn as they started with the added gay curiosity. We dont see them grow to accept each other.
20% dialogue/story
10% romance