The main character is one of the most self aware, mature protagonists i've seen in a good while. sure he acts childish at times, but when it comes to introspection or sexuality, he's well past the questioning unsurety of highschool and has figured himself out. It also acknowledges that even if one person falls in love, the other does not have to reciprocate the feelings.
The characters are surprisingly well rounded and given believable actions. And the art is super cute.