Two weeks after escaping Heavenly Host Elementary, the students who survived it are still trying to live with what happened inside the cursed school. Ayumi Shinozaki and Naomi Nakashima keep digging for the origin of the curse and turn up the Book of Shadows, a tome of dark rites that includes a spell for raising the dead, and they try it on the friends they lost. Around that attempt, the manga replays Heavenly Host along paths Corpse Party: Blood Covered never took, filling in what-ifs and other victims.