The Executioner and Her Way of Life, Vol. 4 — Mato Sato

Pandmonium in the mountains.
 
Hoping to avoid a future where Menou dies trying to save Akari, the girl from Japan runs away with her sworn enemy, Momo. The pair ride the rails to a secluded village in the mountains where they believe they'll be safe for a few days. Unfortunately, they're not the only ones who decided to stop off there. Manon and Pandmonium have arrived as well, and they aren't alone. Akari had hoped keeping away from Menou would be enough to spare the girl she holds dear, but keeping the Executioner alive may require a more drastic course of action...