The complications of this drama mostly arise from the cultural situation of the community where Teh grows up. Much like any small town, there is instinct to revere similarity and call that normal and that which isn't similar is not normal. Teh has the expectations of being normal, but early on realizes in his heart that he may not be.
Much like a hero in chains his conditioning constrains him from breaking free of the impositions of society to be his true self. The result is much hardship and heartache for those around him as he fights against his nature and causes heartache and pain.
His inclination is to stay true to the values the community has instilled in him, but that goes against what the heart wants and so his head and heart are constantly at war. He's also very bad at communicating his emotions.
Billkin and PP were teamed up for My Ambulance. After seeing how their performance resonated the director decided to make a story just for them. His reflections took several paths until reached the idea of a young man trying to break out his shell in Phuket.
After a childhood tiff Teh gives Oh-aew the cold shoulder. They both feel slighted so it's not 'til they're trying to gain university admission that they are thrown together by chance. Aft first they are antagonistic, but then they realize there's something going on between them that Teh doesn't want to talk about and Oh-aew doesn't have the fortitude to bring to the surface.
There is a great deal of indirection and glancing surfaces in their interactions until they nearly reach a break through while watching a sunset.
From there to the end it's a constant battle for Teh to come to grips with what he knows he feels inside but is too scared to admit to himself. Can Oh-aew help draw him out?