NHK ni Youkoso!, Onanie Master Kurosawa Recommendations
While Onani starts out purely as a Death Note parody about masturbation, complete with Light's 'Just as planned!' faces and in-depth planning, it quickly takes a turn for the serious, delving into anti-social behavior, bullying, first loves and, basically, school life in general. Think of it as a realistic school slice-of-life (with masturbation in the girls’ toilet!) about Light, without Death Notes and his popularity, and you wouldn't be far wrong.
NHK deals with many similar issues, such as not making friends out of fear of rejection and hiding away from the world. There's even a 'contract' with a weird girl in both, though
Both are exceptional insights into the human condition, the concept of belonging in particular. Both great psychological works, and accurately depicted emotions of characters in both series make both an excellent read. These two masterpieces both depict intricate and meaningful messages to its intended audience, which will give them a moment of thought over their social interactions with the people around them.
Off the deep and meaningful essay style writing: Both these series have spots of humor and semi hidden allusions to other popular anime and themes within the otaku sub-culture, which make the angst of the story more bearable for a
Both series deal with antisocial behaviors of different kinds, characters who don't fit in. They also have an educational, almost therapeutic feel to them, as the characters portrayed in them are very realistic and self improvement is a major theme in both stories.
I would recommend the anime version of NHK above its manga version though. The depiction of the struggles Satou goes through is much fairer in it, among other things.
They're both about a single guy who starts off disconnected from the world, with one troubled formerly troubled girl who brings them into the world. Both excellent read.