Watch Clannad

Clannad is a romantic anime that centers around Tomoya Okazaki, a boy in his third year of high school, and Nagisa Furukawa, a caring girl who, though a year older than Tomoya, is repeating the same year due to illness. Tomoya is a bitter delinquent who skips school along with his friend, Sunohara. Nagisa befriends him and together, they make friends and change each other's lives in the process.