Oyasumi Punpun (
here)
This manga was done by Inio Asano, which talks about a young boy called Punpun (who is depicted as a caricatured bird thingy but is otherwise a normal human being, and is seen by everyone else as a normal human being; his family are also depicted in this way) and his coming to grips with adulthood, only intensified once his mother is hospitalized (and his father was taken away due to spousal abuse) and is looked after by his uncle. Readers are shown just what exactly goes on with Punpun as he tries to deal with some of the things humans always have trouble dealing with - relationships, misunderstandings... All that stuff.
personal review - Honestly, I think that this manga is one of the most awesome (and probably, for me, one of the best) coming of age stories I have ever read in my entire life... It's managed to be successfully mature about it despite the rather absurd (but still really well-written) cast, not to mention the extremely open imagination that Punpun has (and that we're treated to most of it as readers! hohoho). Furthermore, the manga does seem to hit really accurately some of the points of real life which can make us people as humans get really down. Asano doesn't pull any punches with this one - you might find yourself laughing one moment but either cringing or crying the next, it's really a roller-coaster like how we see Real Life.
Oyasumi Punpun does blatantly tackle more touchy and mature issues as well, such as depression and sex (and the sex that IS in the manga isn't at all gratuitous, though Asano does inject his own flair of... um... surreal into it
). But, there was a time when I realized - why is Punpun and his family drawn the way they are, when it's obvious that they're just normal people like you and me? Well, this is something that, for me, made reading the manga an even more immersing experience (
). I wouldn't really wanna talk about that here, I'd suggest reading it, because it's really damn good. It's a somewhat accurate take on some of the more grueling parts of life, and yet manages to turn that into melancholic comedy.
One of the only bad things I do have to say about that is that this isn't something for the faint of heart - you won't be able to fully appreciate it if you can't really stand depressing stories, nor would you be able to appreciate it for the extreme characters that seem to be written to be "genuine" rather than outright "likeable" (Though they aren't mutually exclusive, it seems that way to me).
tl;dr
Oyasumi Punpun is really deep shit,
go read it