Restoration.Yuta and his friends discover that, in addition to all the damage being undone, nobody remembers the kaiju attack or of those killed during the attack. Following their investigation and reason that only they remember, they are approached by a mysterious man named Samurai Calibur who "optimizes" Junk so Rikka and Utsumi to interact with Gridman. They continue to investigate the missing students and learn that everybody's memories have been rewritten to believe they had all died before reaching high-school...