Undead Unluck manga volume 15 features story and art by Yoshifumi Tozuka.

Fuuko earns the right to sit in the first seat and initiate the loop. However, Sun, the god of the world, finally shows themself and Ragnarøk, the final battle, begins. All the Negators combine their efforts to prevent Sun from destroying Ark before Fuuko can loop. But with 11 minutes until Ark is fully functional, will Andy and the others be able to hold out long enough for Fuuko to succeed?