Saike Kuzushiro, a lackluster and reserved middle schooler, undergoes a profound transformation after the tragic loss of his childhood friend, Mikan Karatachi, in a fatal accident. Desperate for a second chance, Saike pleads to a higher power, only to find himself waking up in the past on the day of the fateful event. Now faced with the opportunity to alter fate, Saike grapples with the weight of altering destiny. Can he rewrite history to prevent Mikan's demise, or is he bound to relive the same tragedy? Volume 3 features the compelling one-shot: The Negatibrain.