I spent many hours looking for a manga that mainly focuses on unrequited love and the sorrow it brings. If you are looking for something like that then this manga might be for you.
I like this manga because it explores the feelings of a one sided love. As you go through the story, you'll see other unrequited love stories too and not only that of the main character. It showed me the different aspects or situations of love and from that alone, I would give the manga a really great score. Imagine being in a one sided love for 20 years and on top of that, you get to see the love of your life go through his relationship with the love of his love and the fact that the MC can't compete with that because the wife is already dead just adds up to the blow. Love is complex and losing a loved one can take a toll on a lot of people.
The one thing that I didn't particularly love about this manga is the ending. Not because it was bad but because it was lacking. SPOILER: I feel like the ending should have shown Mame And Souta being a couple more and doing couple things because that was the point of the story, but instead it kind of ended with an honorary acknowledgement to the dead wife which is also okay but not really fitting as the end panel for the ending for a romance manga.

Overall, I would recommend this movie to anyone who is looking for an unrequited love story that can make you sad at times because of the feeling of hopelessness I guess. I absolutely loved this manga and this has become one of my faves! Good job!