The more I think of it, the more this ending reminds me of 'Goodnight Punpun', except that with Punpun it was all more bittersweet or melancholic, while the last few pages of this manga feel to me as if they are trying very hard bend it all into some sort of happy ending. I think that's really the part that bugs me about it. If it had ended with them being miserable, I actually believe I'd have liked this all a whole lot better.