Story Structure — 4 Plot Phases
World of Bubbles
Tokyo is overcome by reality-breaking bubbles after an explosion at Tokyo Tower, forcing young people to live in restricted areas using parkour tournaments for survival.
Key Events
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Bubble Apocalypse — World overcome by reality-breaking bubbles Characters: Hibiki, Makoto, Shin, Kai, Usagi, Isozaki, Osawa
Location: Tokyo
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Tokyo Tower Explosion — Explosion concentrates bubbles in Tokyo Characters: Hibiki, Makoto, Shin, Kai, Usagi, Isozaki, Osawa
Location: Tokyo Tower
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Parkour Society — Young people live in restricted Tokyo using parkour tournaments Characters: Hibiki, Makoto, Shin, Kai, Usagi, Isozaki, Osawa
Location: Tokyo Streets
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Hibiki's Hearing Sensitivity — Hibiki avoids others due to hearing sensitivity Characters: Hibiki
Location: Blue Blazes Hideout
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Mysterious Song — Hibiki hears a woman's song and sees a boy Characters: Hibiki
Location: Tokyo Streets
Creation of Uta
Hibiki creates Uta from his breath and bubbles, beginning a unique relationship as he teaches her to be human through parkour.
Key Events
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Mysterious Song — Hibiki hears a woman's song and sees a boy Characters: Hibiki
Location: Tokyo Streets
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Tokyo Tower Attempt — Hibiki attempts to climb the tower Characters: Hibiki, Undertaker Leader
Location: Tokyo Tower
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Ocean Creation — Hibiki's breath creates Uta from bubbles Characters: Hibiki, Uta
Location: Ocean
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Uta's Birth — Uta is born and learns to be human Characters: Hibiki, Uta
Location: Ocean Shore
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Parkour Training — Hibiki trains Uta in parkour Characters: Hibiki, Uta, Makoto, Shin, Kai
Location: Tokyo Streets
Love and Loss
Hibiki and Uta grow closer through parkour, but her arm disappears when they touch, foreshadowing her eventual sacrifice to save Tokyo.
Key Events
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Parkour Training — Hibiki trains Uta in parkour Characters: Hibiki, Uta, Makoto, Shin, Kai
Location: Tokyo Streets
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Undertaker Challenge — Blue Blazes compete against Undertakers Characters: Hibiki, Uta, Undertaker Leader, Denki Ninja Leader
Location: Parkour Arena
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Arm Disappearance — Uta's arm fades when touched by Hibiki Characters: Hibiki, Uta, Undertaker Leader
Location: Parkour Arena
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Bubble Resurgence — Bubbles return forcing residents to flee Characters: Hibiki, Uta, Makoto, Shin, Kai, Usagi, Isozaki, Osawa
Location: Tokyo
Sacrifice and Hope
Uta sacrifices herself to stop the bubbles at Tokyo Tower, fading into bubbles like The Little Mermaid, leaving Hibiki with memories and a possible connection.
Key Events
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Uta's Sacrifice — Uta goes to Tokyo Tower to stop the bubbles Characters: Hibiki, Uta
Location: Tokyo Tower
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Final Rescue — Hibiki saves Uta and they save each other Characters: Hibiki, Uta
Location: Tokyo Tower
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Uta's Farewell — Uta fades into bubbles like The Little Mermaid Characters: Hibiki, Uta
Location: Tokyo Tower
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Tokyo Rebuilding — Citizens return and rebuild the city Characters: Hibiki, Makoto, Shin, Kai, Usagi, Isozaki, Osawa
Location: Tokyo
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Parkour Continuation — Hibiki continues parkour with a bubble following him Characters: Hibiki
Location: Tokyo Streets
In an abandoned Tokyo overrun by bubbles and gravitational abnormalities, one gifted young man has a fateful meeting with a mysterious girl.