Overlord: Sei Oukoku-hen - Manner Movie

Even on the road to the Sacred Kingdom, Nazarick leaves little to chance. Before the journey begins, familiar faces lay down a few simple rules for anyone sharing the theater: do not disturb others, keep phones from ruining the moment, and avoid behavior that spoils the experience for everyone nearby. Naturally, when the instructions come from the world of Overlord, ordinary screening etiquette can sound suspiciously like commands best obeyed.