Oyasumi Punpun scanlations have continued updating: the series is becoming ever more harrowing and difficult to read as it nears the end. I'm glad I started but I'm not sure I'd recommend it.

As the person who introduced Oyasumi Punpun to Tvtropes, I'll note that the forum discussion on the series quickly turned to other things you can read afterwards to pick your mood up. I'm holding off on reading the more recent updates until I can find something adequately heartwarming.