Onanie Master Kurosawa, Hoshi no Samidare Recommendations
Both of these are coming of age stories that focus very heavily on what kind of person the main character wants to grow up to be. Both start off with a pathetic, introverted protagonist who puts up barriers against new people. Eventually they begin to realize that they are growing up, and the process is not only enjoyable, but extremely liberating. Both series start of antagonizing slow but they both turn into very solid stories.