Sang-woo’s betrayal of Ali is even more painful in Korean
The nature of the connection between Sang-woo and Ali is one of the most significant information that most viewers are unaware of. According to the English translation, in episode 5, “just call me Sang-woo,” says the former, but Ali starts calling him “Sang-woo,” which is not what happens in Korean.
In episode 6, Ali tells Sang-woo that he can call him “hyung,” which is the term a male uses for his older brother or a very close male friend. His betrayal was even more damaging in Korean since, at the end of episode 6, when Ali was frantically searching for him, he shouted, “hyung!” – as if seeking his older brother.