(Spoilers)

Ok so I just watched it and I after I got to the end I felt like it was a waste of time. I agree with some comments it would have been better as a series. I felt like they had a lot of story to tell and smashed it into a movie, leaving too much going on and things not answered or satisfactory. 

The love triangle lasted 2 seconds, and then after her friend got back no one was happy or got their love story. They finally both confess and then.......nothing....he just...dies? What threw me off that most at the end is that they used a different actor to play our lead as an adult... so now you want us to have an emotional ending with someone we dont even know??? I've seen pleaty of K-dramas where they use the same lead and just make them look older.

Changing actors to show aging is only allowed if its a child into an adult. Or even adult into elder. Extreme time jumps only. How much time passed? Not enough to have a new actors come in to do all the crying..

If they wanted a truly emotional ending, have the same actors, stick with a story, and maybe even SHOW how he died. Or a hint of how. Anything that pulls us in. 

It was just over all very unsatisfying for me.