When it comes to choosing a series to read, the first thing that catches my attention is the art. This manga definitely had that covered. It's art, I would say is one of the better ones I've seen. Though the main character Serizawa does not have any outstanding feature, overall the characters of this manga are well designed and attractive in their own way . This manga handles the change in Serizawa's as a person through meeting several heroines over many years.
Although I would get angry at how stupid Serizawa was from time to time, overall the story was enjoyable. The ending was not to
my taste, though it feels like more and more series end in similar fashion. One could argue it was a fitting ending for the story, but to me it felt like it was rushed to end early. Maybe it got the ax? Who knows.
I would say give this manga a go, it's definitely worth while. However, if you don't like the open ending, stay away from it.