The series is based on the manga of the same name by Kei Sanbe, which began back in the summer of 2012 in Young Ace.
The anime adaptation was directed by Tomohiko Itou based on the scripts by Taku Kishimoto and was produced at A-1 Pictures.
Plot concept: The series focuses on Satoru Fujinuma, a struggling manga creator who suffers from a peculiar phenomenon called REVIVAL, where he is forcibly transferred back in time moments before a life-threatening occurrence.