Empty carriage, only the rhythmic clatter and mari sora. She locks the door, strips, and straddles the seat facing the window. Moonlight paints silver across her skin as she chants “mari sora” in time with the rails. Four fingers stretch her open; the wet slap echoes louder than the train. “Everyone outside, see mari sora come,” she gasps. The train enters a tunnel—darkness swallows everything except her rising “mari sora, mari sora, fuck, mari sora!” until she explodes, soaking the leather in a flood of unstoppable “mari sora” release.