The light novel series has been adapted into an anime series, which is currently being animated by White Fox and has been airing since April 2016. The series has been also adapted into several ongoing manga series; Parts 1 and 3 have been serialized in Gekkan Comic Alive while Part 2 has been serialized in Gekkan Big Gangan.
An anime OVA was announced in 2017 and an English dub was announced in 2018, scheduled to air in Summer 2018.
Suddenly, high school student Natsuki Subaru has been summoned to another world on the way back from the convenience store. With the biggest crisis of his life being summoned to another world and no sign of the one who summoned him, things become worse when he is attacked. However, when he is saved by a mysterious silver-haired girl with a fairy cat, Subaru cooperates with the girl to return the favor. When they finally manage to get a clue, Subaru and the girl are attacked and killed by someone. Subaru then awakens in the place he was summoned and notices he gained the ability "Return by Death." Subaru is a helpless boy that only has the ability to rewind time by dying. Despite the despair, can he rewrite history and save that girl from a fated death?
A 25 episode anime adapation was produced by White Fox and directed by Watanabe Masaharu, and is currently airing in Japan from April 2016. The anime will be collected into nine DVD and Blu-ray Disc sets which are scheduled to be released from June 24, 2016 to February 24, 2017.
Suehiro Kenichirou of ONEMUSIC was in charge of the music for the anime. The anime uses Redo and STYX HELIX as its opening theme and ending theme for the first cour and Paradisus-Paradoxum and Stay Alive for the second cour.