Mitsuki's dreams come true when he is isekai'd to another, magical world! Once he meets the kindly priestess Menou, his grand adventure is sure to begin... right?

An ordinary trip by train goes off the rails when Menou and Akari are caught in the crossfire of a terrorist attack on Princess Ashuna.

A priestess pure, just and strong—or a villain reviled by all? Menou knows precisely which one she wants to be, and she has one person to thank for her singularity of purpose.

As Momo investigates a rash of disappearances, Menou and Akari spend a final day together. But sinister forces move in the shadows, and the upcoming ritual isn't as it seems...

A ominous plot unfolds, trapping Akari and Menou in its center. But help is coming from the outside — and from within, too, if Menou can play her cards just right.