Kiitaharu Yarikawa wakes up to a nightmare — Tokyo in flames, war machines flooding the sky, and a massive starship casting its dark shadow over the ruined city. The entire world has been wiped out at once. Only a few survivors remain in Tokyo, forced into a brutal experiment where suffering is the ultimate goal. But amid the chaos, the emperor’s gaze is locked on Kiitaharu. Why? As he fights to survive the apocalypse, his mysterious buried past begins to unravel — holding answers that may be even more terrifying than the war itself.