Hakuno Kishinami wakes on the Far Side of the Moon Cell, where an AI called BB has pulled Masters and Servants out of the Holy Grail War into a maze of her own making, the Sakura Labyrinth. Hakuno's Servant and a handful of surviving rivals are the only footing left, and BB has rewritten what winning even means. This manga adapts the Fate/Extra CCC game, moving the digital Grail War off its familiar arena and onto BB's terms.