Alright, I take back what I said... chapter 36 was perfect as a transition to show how Yousuke decided to move on with his life, especifically without Koharu. But this ending, man! It is not about being rushed, but the fact the dude not only had not moved, but even ended up together with the girl...
I can think of Anagura Amelie (manga) as an example of good lead that decides to let go (after a lot of drama), and you could fully support his decision even if the partner claimed to like him. It should be easier to write an ending like that than force this "after you got tired of me not taking you seriously, and moved to Italy, I've realized my feelings and waited for years!" or "To show my sincerity, I've decide to live and die with only you in my heart, therefore, unmarried!". The latter is more a venting on badly written wuxias, but still, this ending is far from being satisfying, and felt forced - even if planned since the beginning, things do not fit well together, chapter 36 should explain it all.