It would have been better if the last chapter wasn't there, that chapter messed up the ending.
By the end of 53rd chapter it seemed that everything was back to normal. But what happened in the last chapter (54th) everything was totally random and downright unexpected. Like why the heck someone wanna do like that! Whatever happened till 53rd chapter didn't make sense all the relations, character and personality which slowly took shape over the course of approximately 2,500 pages was ruined by last 50 pages.
As for the rest of the manga.....it is quite unpredictable and, have some deeper meaning in it. It's not just about romance triangle. It focuses on behavior of teenagers with a lot of meaning and different situations. It contrast of how people behave socially, even if it means to hide their own personality.
At the end that feeling of manga having a uncertain ending which leaves you at unrest is also a beautiful ending. But it would have been equally beautiful if its ending was clear and not that twisted.
