Air is a Japanese visual novel developed by Key which was originally released as an adult game on September 8, 2000 playable on personal computers (PC) as a CD-ROM.
Air is set in the Kasumi district of Kami; during the course of the series' creation, Kasumi was an individual town that has since merged with two others to form the city of Kami. Many of the locales in Air, such as the seawall, the train station, the shrine, and the school are based on real places. As Air is set in the middle of summer, the season offers bright, sunny skies for the town during the day. In the manga adaptation, the town is described as a "quiet town with few people...with nothing but beaches and countryside." Scenario assistant Yūichi Suzumoto has commented that his impression of Air is similar to that of a folk song due to the rural setting and heartwarming story progression.