Tomodachi (1974)

Shinta is a sixth grader in Kawasaki City a troublemaker that dreams to become a soccer player. Yoshiko, a classmate who moved to Kawasaki from Iwate Prefecture two years ago, is a gloomy girl who suffers from asthma due to the polluted air in Kawasaki and is ostracized by her class. Shinta is placed next to Yoshiko in class and their stories will take a turn.