The opening song is “Deep in Abyss” as performed by Miyu Tomita and Mariya Ise while the ending theme song is “Tabi no Hitarite, Saihate no Migite” by Miyu Tomita and Shiori Izawa.
The Japanese cast includes Miyu Tomita as Riku, Mariya Ise as Regu, Shiori Izawa as Nanachi, Mutsumi Tamura as Natto, Manami Numakura as Shigi, Manami Hanawa as Kiui, Taishi Murata as Jiruo, and Maaya Sakamoto as Raiza.
The show and the film are directed by Masayuki Kojima based on the scripts and screenplay by Hideyuki Kurata.