Boku dake ga Inai Machi

A strange phenomenon where one is transferred back to the moment right before something life-threatening occurs. This continues to happen until the cause of the threat is erased. It is as if somebody is forcing Satoru to stop it from happening. Then one day, everything is changed. What truths are revealed when Satoru comes face to face with his own past? How will they affect his future?

Boku dake ga Inai Machi: Re (Gaiden volume) is considered volume 9 of the series

Was nominated for the 18th Tezuka Osamu Cultural Prize Reader Award in 2014 and for the 7th, 8th and 9th Manga Taisho Award between 2014 and 2016. Also nominated for the 40th Kodansha Manga Awards in 2016.

Links:
AnimeNewsNetwork (live-action movie)
AnimeNewsNetwork (anime)