Boku dake ga Inai Machi, literally translates into "The Town Where Only I am Missing" and is most commonly referred to as Erased.
Erased, is a manga series written and illustrated Kei Sanbe serialized from June 2012 to March 2016. The story was converted into a twelve episode anime which ran January 2016 - March 2016. The story is about an average man named Satoru Fujinuma with an extraordinary ability. Satoru has the unique ability to travel through time. His ability to works unconsciously and lacks control, but it does save lives.
Whenever a life threatening accident occurs in Satoru's vicinity he is forced back in time to a point before the accident. Once sent back Satoru has a limited amount of time to solve the problem before he returns to the present. Whenever Satoru alters the past only he knows what changed from the timeline.
15 years before the series starts, several girls from Satoru's middle school disappeared and were murdered. The cases remained unsolved. When Satoru's mother gets killed, and the killer tries to frame Satoru, he realizes that the murderer is someone he knows. Aside from his mother, all the people close to Satoru get dragged into a murder case more than a decade old.
What follows is a hair raising, suspense, thriller that will have you sitting on the edge of your seat. Satoru faces one tragedy after another while being sent back to middle school with all the memories of a twenty-eight year old. He has to find the killer and stop him from murdering his mother and several of his middle school class-mates before he runs out of time.
The anime is an excellent adaption of the manga series and worth watching. Below is a clip of Satoru being confronted by the killer. It's a huge spoiler but since most of the videos are removed within the first week. You'll only know who it is if you read this fast...if not you have to watch the series.