Boku dake ga Inai Machi Gaiden
- Volume Not AvailableChapter 1-5
- Ch 5 Dec 1, 2016 Ch 4 Oct 25, 2016 Ch 3 Aug 15, 2016 Ch 2 Jul 14, 2016 Ch 1 Jun 15, 2016
Spin-off from Boku dake ga inai machi. It tells the story of what happened while Satoru was in a coma.