Fate Rewinder, 1

How many times would you be willing to relive a tragedy to save a life? The Rewinders are an elite unit of the Space-Time Police whose mission is to save people who have suffered a tragic death. Their weapon is the Retry Eye, an implant in their right eye capable of manipulating time. To solve each case, they won't hesitate to go back dozens, hundreds, or even thousands of times, repeating events again and again until they change the ending.