koutei

The story is set in the year 2016, during the final era over which magic still held a strong influence. The humanity survival and security organization Chaldea was established to observe the world that can only be seen by magic and the world that can only be measured by science; as well as to prevent the final extinction of humanity.

This OVA presents an alternate universe to the original Clannad anime, in which Okazaki Tomoya is dating Sakagami Tomoyo in the 24th and final episode of Clannad. When Tomoyo is elected Student Council President, her dream to save the school's cherry blossom trees from being cut down begins to come to fruition.

Clannad is set in a high-school located in a town in Japan, which one isn't really specified. Okazaki Tomoya is a third-year student who doesn't take his studies seriously.

Included in the 8th and final DVD of Clannad ~After Story~ is an extra episode set in an alternate universe. Here, Fujibayashi Kyou is the main heroine in place of Furukawa Nagisa.

Tomoya is labelled as a delinquent at his school because he is constantly late and skips classes, but he seems to have little care about how others perceive of him. Everything in his life seemed dull and unchanging until one morning he meets Nagisa Furukawa on the road to his school; he finds her muttering to herself to give her more motivation for the school day.

Events in After Story take place immediately after the end of the first part, but extends into the next ten years, where Tomoya and Nagisa live together as a family. Life continues on for Tomoya.