Story Structure — 4 Plot Phases
Desolate Departure
Chito and Yuuri navigate post-apocalyptic ruins, surviving daily while trading with Kanazawa. Their routine is interrupted when their vehicle breaks down, forcing them to seek assistance from a local plane builder.
Key Events
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Post-Apocalyptic Journey — Two girls navigate desolate winter ruins while surviving day-to-day.
Location: Ruins
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Daily Survival Routine — They conduct simple activities like washing clothes and bathing.
Location: Camp
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Encounter with Kanazawa — They meet a man mapping the city and trade food for his camera.
Location: City Level
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Camera Handover — Kanazawa gives them his camera before helping them reach the next level.
Location: City Level
Mutual Aid and Flight
Cooperation with Ishii yields vehicle repairs and a failed flight attempt. The girls receive crucial information about a potato facility before continuing their ascent through the city levels.
Key Events
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Camera Handover — Kanazawa gives them his camera before helping them reach the next level.
Location: City Level
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Kettenkrad Breakdown — Their vehicle breaks down, forcing them to seek help.
Location: City Level
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Meeting Ishii — They encounter a woman building a plane and offer assistance.
Location: Workshop
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Mutual Repair — They help finish the plane while she fixes their vehicle.
Location: Workshop
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Ishii Flight Attempt — Ishii attempts to fly to the city across the water but breaks down shortly after liftoff.
Location: Runway
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Potato Facility Info — Ishii leaves them information on a potato facility before departing.
Location: Workshop
Submarine Revelation
Discovery of graves and aquarium robots leads them to a submarine. There, they encounter Nuko and learn profound truths about energy species and human extinction.
Key Events
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Potato Facility Info — Ishii leaves them information on a potato facility before departing.
Location: Workshop
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Grave Discovery — They pass black slabs filled with drawers, which Chito deduces are graves.
Location: City Level
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Aquarium Robot Encounter — They discuss with a caretaker robot before destroying a construction robot to save a fish.
Location: Aquarium
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Discovery of Nuko — They find a cat-like creature that communicates via radio signals.
Location: Drinking Hole
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Submarine Exploration — Following signals, they enter a submarine with synchronized image displays.
Location: Submarine
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Yuuri Consumption — Yuuri is temporarily eaten by a larger Nuko creature.
Location: Submarine
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Energy Species Revelation — The adult Nuko explains their species stabilizes unstable energy.
Location: Submarine
Ascent and Silence
The final stretch past museums and rockets ends with permanent vehicle loss and book burning. They reach the desolate city peak and rest, accepting the quiet end of their journey.
Key Events
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Energy Species Revelation — The adult Nuko explains their species stabilizes unstable energy.
Location: Submarine
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Human Extinction News — Creatures inform them they are the only humans left on this level.
Location: Submarine
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Art Museum Visit — They continue their journey and encounter an abandoned art museum.
Location: Museum
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Rocket Facility Discovery — They find a research facility with rockets intended for wartime escape.
Location: Facility
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Kettenkrad Destruction — Their vehicle breaks down permanently, forcing Chito to burn books for warmth.
Location: City Level
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Reaching the Top — They finally ascend to the top of the city and find it desolate.
Location: City Top
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Final Rest — They go to sleep, resting against the wall of the stairwell.
Location: Stairwell
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Journey Continues — Despite the bleak reality, their journey through the ruins persists.
Location: Ruins
