Koi Kaze, NHK ni Youkoso! Recommendations
A young girl suddenly appers and changes the main hero's life forever. Both anime's have a great psychological aspect in them.
Both main characters experience psychological trauma. Can get a bit depressing at times but still has some comedy.
The old school art and serious vibe immediately link the two Masterpieces. Both main characters, Satou and Koshiro share similar habits and inner turmoil. This ranges from smoking, badgered clothing and unkempt/unshaven appearance, and accumulating garbage and tissues around their residence, as well as the psychological ramifications of their predicament and the societal acceptance, or lack thereof. Both share comparable female's in Misaki and Nanoko, who are fairly younger and intrude in the MC's life as love interests out of the blue, but with a predetermined goal in mind. Both MC have reservations from pursuing their love interests, albeit for different reasons, yet both divulge
Both sets of protagonists, or couples rather, are socially inept, naive, aimless wanderers with disjointed families. In addition both use their relationships to straighten themselves out and reintegrate into society. While in NHK our protagonist are already outcasts and fully detached from society, in Koi Kaze you witness that transformation happen first hand. Both these shows are excellent examples of the social standard.