Ef: A Fairy Tale of the Two is a Japanese two-part adult visual novel series by Minori for Windows PCs. The first game in the series, Ef: The First Tale, was released on December 22, 2006, and the second game, Ef: The Latter Tale, was released on May 30, 2008. The opening video for the game was animated by Makoto Shinkai, and a majority of the music was produced by Tenmon, who has worked in the past with Shinkai and Minori. Female character design was by Naru Nanao of Da Capo fame, while male character design was by 2C Galore.