Feels weird to say a 104 chapter manga felt short, but I really do think it could have used some more time to wrap up. The ending came a bit out of nowhere, even for the main characters and Ataru, who got some resolution. For Miho, moreso Nemori, and especially Kita, it felt like there were threads left hanging, and a lot of stuff left unresolved. Not that their problems all needed to be solved in the end, just that the setups needed some kind of payoff, and never got it.
In general, I did love it. The ending specifically just felt more like an axing than a conclusion.