Abyss

An anime television series adaptation was announced in December 2016. The 13-episode series aired from July 7 to September 29, 2017 on AT-X, Tokyo MX, TV Aichi, Sun TV, KBS Kyoto, TVQ, Saga TV, and BS11 and covers content from volumes 1 through 3. The final episode was a 1-hour long special. The series was directed by Masayuki Kojima and written by Hideyuki Kurata, with animation by Kinema Citrus and character designs by Kazuchika Kise. Australian artist Kevin Penkin composed the soundtrack for the anime. Miyu Tomita and Mariya Ise (the actresses for Riko and Reg, respectively) performed both the opening theme “Deep in Abyss” and the ending theme “Tabi no Hidarite, Saihate no Migite”, the latter in collaboration with Shiori Izawa (Nanachi).