The story is not what you saw in trailer. Ready to be amazed. It's a really good drama with perfect cinematography, aesthetics, OSTs and acting. The cast is so good and chemistry is just so natural. As for the ending, it's realistic given their struggling background, they would have keep hurting each other and drift apart. So the choose to stay away but they still deeply love each other.
I still don't understand what exactly happened to make ML choose separate ways. Like 1 more detailed scene to show the background of his decision, would have been better. Still 5/5.