I just finished it few minutes ago but I'm disapointed a lot.
The last episode totally ruined the whole series. If the writer chose to leave Jun dead it would be much better, it's not that I didn't like him, it's just that it's not real at all. The actors did a great job so that makes me even more mad.
When I finally reconciled the fact that he's ill and that he will propably die, they ended it with Jun being a total jerk and making his mother tell Ra-Ra that he's dead and then come after 5 years back to her and tell her that he's healthy now and that basically he was faking his death for 5 years!? I loved this drama at the beginning but it took a half an episode to completly change my mind. But I don't want to be just critical and I want to say that the OST was nice and the actors were great. It's really a shame, I think it would be better either without his illnes or if it would be needed than the sad ending wouldn't actually be that bad but I'm really disapointed because I had high expectations. If you still want to watch it I recommend to watch it just till ep 15.