What is CLANNAD's cartoon about?

An animation based on the feelings of Okazaki Tomoya, the protagonist, tells the story of an ordinary high school student's life, which is unfolded by an encounter on Sakura Road. Because of love, friendship is gradually on the right track, which is more realistic. It is one of the three major tear works of Key Club! Looking good is looking good, and the ending makes people cry. . . . . . .