I can understand you very well cause i heard some rumors bout raws but I still think with all my heart that some of the sad moments the author showed us is that just wanted to include the facts of life and want us to see them overcome these challenges together. We saw that they became a happy couple after many years between chapters and I hope it’ll last forever. I don't know if I'm just comforting myself, but these are side stories
They are spanish translations not raws, my bad, I also saw this from a comment below
https://mangas.in/manga/here-u-are
I feel like it's gonna hurt so bad when it's completed. not because it's completed or it's angst but because the characters' feelings aren't what they used to be. i mean, of course, they will continue to love each other, but as they get older, life will become more challenging. because of the weights they carry on their shoulders there is a possibility that their love will not be as dynamic, passionate and deep as it used to be.
it's just a guess by the way, this manhua can end very happily without ever being bittersweet, that's just how i feel and think about it right now