On a rainy day, Ryou Fujibayashi musters up the courage to confess her feelings to Tomoya Okazaki. Despite not knowing each other for long, the two start dating and develop a harmonious relationship. However, tensions begin to rise when a rumor surrounding Tomoya and Ryou's older sister Kyou spreads around school. Navigating through a web of emotions, Tomoya and the Fujibayashi twins determine where their love truly lies—even if it means standing in the downpour of the heartbreaking truth. [Written by MAL Rewrite]

Clannad: After Story - Mou Hitotsu no Sekai, Kyou-hen was included in the eighth and final compilation DVD of Clannad: After Story, released on July 1, 2009.