Plot Analysis Summary
A lonely man's life is transformed by an artificial protector whose sacrifice, memories, and temporal connection reshape their shared fate.
Story Structure — 5 Plot Phases
The Birthday Encounter
Jiro spends his twentieth birthday alone before meeting a mysterious girl at a shopping mall and restaurant. Their strange, impulsive evening creates an immediate emotional connection before she leaves.
Key Events
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Jiro's Lonely Birthday — Jiro spends his twentieth birthday alone on 22 November 2007. Characters: Jiro Kitamura
Location: Tokyo
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A Stranger's Smile — A mysterious girl smiles at Jiro while he shops for himself. Characters: Cyborg, Jiro Kitamura
Location: Shopping mall
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The Stolen Clothes — The girl steals clothes, and Jiro notices but chooses not to stop her. Characters: Cyborg, Jiro Kitamura
Location: Shopping mall
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Birthday Restaurant Meeting — The girl follows Jiro to a restaurant and claims that it is also her birthday. Characters: Cyborg, Jiro Kitamura
Location: Restaurant
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Two Birthday Gifts — Jiro and the girl exchange birthday presents during their unusual dinner. Characters: Cyborg, Jiro Kitamura
Location: Restaurant
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The Unpaid Escape — The girl rushes out with Jiro without paying, leading to a street chase. Characters: Cyborg, Jiro Kitamura
Location: City streets
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A Tearful Goodbye — After several hours together, the girl leaves Jiro with a tearful goodbye. Characters: Cyborg, Jiro Kitamura
Location: City streets
The Protector Revealed
One year later, the girl returns during a restaurant shooting and displays extraordinary strength. A future recording reveals that she is a cyborg created by Jiro's older self.
Key Events
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A Tearful Goodbye — After several hours together, the girl leaves Jiro with a tearful goodbye. Characters: Cyborg, Jiro Kitamura
Location: City streets
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The Birthday Return — One year later, the same girl unexpectedly joins Jiro at the restaurant. Characters: Cyborg, Jiro Kitamura
Location: Restaurant
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The Restaurant Shooting — A gunman attacks the restaurant, and Cyborg throws him out of a window. Characters: Cyborg, Jiro Kitamura
Location: Restaurant
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The Future Projection — A projection of elderly Jiro explains that Cyborg was created to save his younger self. Characters: Cyborg, Jiro Kitamura
Location: Jiro's home
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The Protector's Mission — Cyborg becomes Jiro's protector and begins sharing daily life with him. Characters: Cyborg, Jiro Kitamura
Location: Tokyo
Miracles Across Tokyo
Cyborg becomes Jiro's protector and prevents several tragic deaths across Tokyo. Their companionship deepens as Jiro grows increasingly dependent on her.
Key Events
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The Protector's Mission — Cyborg becomes Jiro's protector and begins sharing daily life with him. Characters: Cyborg, Jiro Kitamura
Location: Tokyo
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Saving the Small Boy — Cyborg saves a small boy from an oncoming truck. Characters: Cyborg, Jiro Kitamura
Location: City road
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The School Fire Rescue — Cyborg rescues an elementary school soccer team from a fire. Characters: Cyborg, Jiro Kitamura
Location: Elementary school
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The Knife Attack — Cyborg prevents a knife attack at a girls' high school. Characters: Cyborg, Jiro Kitamura
Location: Girls' high school
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Love Without Response — Jiro falls in love with Cyborg, but she cannot initially return his feelings. Characters: Cyborg, Jiro Kitamura
Location: Jiro's home
Love Before Disaster
Jiro falls in love with Cyborg but reacts bitterly when she cannot return his feelings. Their temporary separation is followed by hidden protection and the devastation of Tokyo's earthquake.
Key Events
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Love Without Response — Jiro falls in love with Cyborg, but she cannot initially return his feelings. Characters: Cyborg, Jiro Kitamura
Location: Jiro's home
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The Drunken Rejection — On 13 March 2009, Jiro drunkenly forbids Cyborg from seeing him. Characters: Cyborg, Jiro Kitamura
Location: Jiro's home
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The Hidden Protection — Jiro realizes that Cyborg continues helping him while staying out of sight. Characters: Cyborg, Jiro Kitamura
Location: Tokyo
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The Tokyo Earthquake — A gigantic earthquake devastates Tokyo on 3 April 2009. Characters: Cyborg, Jiro Kitamura
Location: Tokyo apartment block
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Cyborg's Sacrifice — Cyborg saves Jiro but is destroyed after saying she understands his feelings. Characters: Cyborg, Jiro Kitamura
Location: Collapsed apartment block
Memory, Return, and Fate
Cyborg sacrifices herself to save Jiro, leading him to spend decades rebuilding her. In the distant future, the original girl accesses Cyborg's memories and returns to change Jiro's fate.
Key Events
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Cyborg's Sacrifice — Cyborg saves Jiro but is destroyed after saying she understands his feelings. Characters: Cyborg, Jiro Kitamura
Location: Collapsed apartment block
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The Long Reconstruction — Jiro recovers Cyborg's body and spends 61 years rebuilding her. Characters: Cyborg, Jiro Kitamura
Location: Jiro's workshop
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Jiro's Final Death — Jiro succeeds in rebuilding Cyborg and dies shortly afterward on 28 September 2074. Characters: Jiro Kitamura
Location: Jiro's workshop
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The Cyborg Auction — In the future, a girl buys the defunct cyborg after learning it resembles her. Characters: Cyborg
Location: Auction venue
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Memories From the Hard Drive — The girl's machine reveals the memories stored inside the cyborg's hard drive. Characters: Cyborg, Jiro Kitamura
Location: Future laboratory
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The Original Girl Returns — The original girl travels back to meet Jiro before the cyborg did. Characters: Cyborg, Jiro Kitamura
Location: Jiro's past
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A Changed Fate — The girl declares that she can feel Jiro's heart and chooses to live with him. Characters: Cyborg, Jiro Kitamura
Location: Jiro's past