A few days ago, i shared a clip at NDFD thread about KhanThong and MangMao being a soulmate cp. A scene that KT shared pain with MM.
Here is a paralle scene in GS. Nok comforted and cried along with Nai. NaiNok can actually be a soulmate cp but there are some obstacles come from their personality and circumstances prevent their romance become a true supportive cp right at the begining.
When watching GS, i always think that the so called "game of love" between Nai and Nok did not actually happen. Nok fall for Nai too fast when she started to approach and try being nice to him. Their love is sincere throughout the show (there is no artificial love or pretending love turn genuine trope here) but they still need Nok to be mature and Nai open all his secrets for them to truely start a healthy marrige/romance.
There are hints about NaiNok care about honest communication and actually do it.
I found it's funny that they always talk about game and who will be winner or loser of the game when they agree to get married but just days before wedding, Nok showed her care about Nai's problem with his mother and then they make an agreement about not keep secret from each other. If they don't really think about their marrige seriously and want it to last then why make this kind of agreement.
From 5:50 is also an honest communication between Nai and Nok.
Nai and Nok's problem is even when they love each other deeply, they did not have enough trust for the other which KT/MM's relationship has. So when they faced their fears (Nok about losing her family and Nai, Nai about losing Nok and their child), they keep secrets from each other and miscommunication.
And then at the end of the show, NaiNok solved their problems and care about building trust in their relationship so i beleive they are also a sweet, caring and supportive couple now. It makes me believe in their happy ending unlike other dramas which i don't buy their HE.