Lynn and Pele are military officers overseeing a peaceful backwater town. They encounter a strange pudding peddler who looks suspiciously like the legendary Ace on the wanted poster.

Licht unleashes his true power, becoming an overwhelming killing machine. However, it seems like his unmatched strengths come at a high cost.

Rihito decides to receive the operation to turn him into an Ace. This is the decisive moment in history that the time travelers wanted to change, but knowing what they know now, they cannot agree on what is best for everyone.