Air is a Japanese visual novel developed by Key, a brand of Visual Arts. It was released on September 8, 2000 for Windows as an adult game. Key later released versions of Air without the erotic content, and the game was ported to the Dreamcast, PlayStation 2, PlayStation Portable, PlayStation Vita and Nintendo Switch. The story follows the life of Yukito Kunisaki, a traveling showman searching for the "girl in the sky". He arrives in a quiet, seaside town where he meets three girls, one of whom is the key to the end of his journey.

Key is a Japanese visual novel studio known for making dramatic and plot-oriented titles. It was formed on July 21, 1998, as a brand under the publisher Visual Arts, and is located in Kita, Osaka.