Date A Live, Vol. 11 (light novel)

Back just in time? With Kurumi's help, Shido has successfully jumped five years into the past in a desperate bid to save the city and everyone he cares about. His mission? Prevent Oragami Tobiichi's family tragedy from ever happening and end her quest for vengeance against Spirits before it has a chance to begin. This won't be easy, because not only will Shido need to carefully avoid changing the wrong events, but he'll also have to move fast to be in the right place at the right time when Phantom arrives!