Wahahahahaha! Since it's Pa'Jaew, I'm guessing he'll look like a Khun Chai again. So the side part (3/4 part hair) would probably be prescribed. HOWEVER if Pa'Jaew wants to be different, just like how King Somching was, he'd change things up. My suggestion was curly hair but then it wouldn't be practical. What would Rames's character be like? (His name is gonna be Rames? Is that right?) I was under the impression that he was going to be a good but quiet guy. Perhaps a bit on the haughty side, and since it's James Ji, I'm sure he will be bitchy (Bitchy as in mean and arrogant) especially when he is getting his revenge on Kim's character. So..... I think he should look like this:
or if it's straight hair, it will turn out like this:
It's because Kim's character is supposed to be a fashionista right? She's supposed to be a high end model-like lady who would easily seduce James Ji (and he does fall for her initially) So James Ji must come off a bit dorky to match her. Then suddenly she kind of hesitates to double cross him but she still does so eventually to save her skin (because her character is a bit immature in the beginning) so with that, I feel that James Ji's character would have to be kind to a certain extent. (Kind so Kim's character will like him. Dorky so James's character would easily fall for her.) THEREFORE. I conclude he must have bangs. Because when James's ji's hair is up, he looks more arrogant. HAHAHAHA. (okay sorry, I'm not making sense anymore). And when done right (as in, if he doesn't look like a bowl headed middle-school child), his bangs can make him look older.