Compile Heart
is a Japanese anime television series produced by A-1 Pictures and Aniplex and directed by Mamoru Kanbe. The 12-episode anime aired in Japan on the TV Tokyo television network between January 4, 2010 and March 22, 2010. The anime was also simulcast on Crunchyroll. "Sound of the Sky" was the debut project of "Anime no Chikara". A manga adaptation illustrated by Yagi Shinba began serialization in the January 2010 issue of ASCII Media Works' "Dengeki Daioh" magazine. A visual novel developed by Compile Heart was released on the PlayStation Portable in May 2010.