Descendants of Darkness is a Japanese manga series written and illustrated by Yoko Matsushita. The story revolves around shinigami. These Guardians of Death work for Enma Daiō, the king of the dead, sorting out the expected and unexpected arrivals to the Underworld.

J.C.Staff Co., Ltd. is a Japanese animation studio founded in January 1986 by Tomoyuki Miyata, who previously worked at Tatsunoko Production. The studio's first release was Yōtōden in 1987. They have produced several well-known anime series, such as Azumanga Daioh, Bakuman, the A Certain Magical Index franchise, Date A Live III, The Disastrous Life of Saiki K., The Familiar of Zero, Food Wars!: Shokugeki no Soma, Is It Wrong to Try to Pick Up Girls in a Dungeon?, Maid Sama!, Mewkledreamy, One-Punch Man seasons 2 and 3, Revolutionary Girl Utena, Shakugan no Shana, Aria the Scarlet Ammo and Toradora!.