"Once I cross over I won't retreat"

Basically the whole point of the show and the ost perfectly embodied this message.

Once again, History writer nailed it.
Chemistry on point.
Soundtrack on point.
Acting on point.
Dialog on point.
Secondary couple made me cry harder than the main, but ok the whole aspect of an injured lead was maintained he doesnt just go and get a magical recovery procedure. The slowly revealing of characters and their motivations, everything was done well. But again that damn chemistry hit me in the feels every time!