Clannad's story revolves around Tomoya Okazaki, a third year high school student who dislikes his life. Tomoya's mother (Atsuko) died when Tomoya was young, leaving his father (Naoyuki) to raise him. After the accident, Tomoya's father turned to alcohol and gambling, and had frequent fights with his son. One day, Naoyuki, while arguing with his son, slammed Tomoya against the window, dislocating Tomoya's shoulder. This injury prevents Tomoya from playing on the basketball team, and causes him to distance himself from others. Ever since then, his father has treated Tomoya nicely, but distantly, as if Tomoya and he were strangers rather than a family. This hurts Tomoya more than his previous relationship with his father, and the awkwardness of returning home leads Tomoya constantly to stay out all night. Thus his delinquent life begins. Tomoya's good friend Youhei Sunohara, who was thrown out of the soccer club over a dispute with his seniors, is also a delinquent and often hangs out in his dorm room with Tomoya doing nothing much.
