It's probably the fact that the story ended in a point where the 2 main characters were finally in the same page in their relationship. I think throughout the story, we didn't really get to see them too close, be it because one was trying to hide something or the other one was trying to do things his own way.
I'm sure there's also some plotholes somewhere (and thats the feeling I personally have, like if I was to re-read it again I would point out a few unanswered things), but I would have loved if there were extras / more chapters that would tell us how they would proceed from the ending on-wards. I'm sure both the families would not be content with their relationship ( also adding to the fact that absolutely no one knows that the original brother is dead, meaning they'll never get that closure :/ )
its so heart wrenching to realize that only those two truly Know each other, but i agree the ending was rushed, if it was more fully developed i would have felt more strongly about their "we only have each other" dynamic
**THIS COMMENT CONTAINS SPOILERS READ AT YOUR OWN RISK
YOO WTF THIS WAS SO GOOD???
like holy shit... I remember reading this when the latest chapter was 17, then 24, then only came back now to see it completed! Marathoned in less than 5 hrs lol.
the story was good, I loved the plot twists but somehow, I feel like there's something missing...? there are also a few missing key points and uh... It feels kinda rushed to the end, and honestly it just needs.... something!! more!! I can't explain for the love of me orz (I just want to read more of them sobs...)
Btw!! I'm still really screaming about the fact that only both of them know each other truly??!? （/TДT)/ It's so sad but it's so good... They only have each other to know their real selves and that's fine...! Because they have depended on each other from the start!!
Woo jin gave up his identity for Taemin's sake, and seeing Taemin('s body) die right in front of him must have been so horrifying... but then, he saw Taemin in Siwoon's body so...!
..while Taemin, who was about to lose himself, saw that Woo jin remembered him, knew about him, and he was saved just by that, realized how Woo jin was still so important to him, probably more than he thought...
ugghhh.h... im drowned by feelings... ┗( T﹏T )┛