[1] The music, composed by Maeda and the group Anant-Garde Eyes, is produced by Aniplex with Satoki Iida as the sound director.
[1] The plot takes place in the afterlife and follows the main protagonist Yuzuru Otonashi, a boy who lost his memories of his life after dying.
[4] The first episode was previewed on March 22, 2010 to a selected number of people who participated in a lottery held earlier that month.
[6][7] Three drama CDs, written by Maeda and performed by the anime's cast, were released with the first, fourth and sixth limited edition BD/DVD volumes.
[6][8][9][10] The seventh BD/DVD volume featured an original video animation (OVA) episode, as well as a bonus short which serves as another epilogue to the series.
[11][12] A second OVA episode was included with a Blu-ray Disc box set, released in Japan on June 24, 2015.
Three days after the shadows incident, only Otonashi, Yuri, Kanade, Hinata, and Naoi remain; the others have passed on.