Hello World (2019) — AI Story Visualization

Plot Analysis Summary

A teenager and his future self alter Alltale's recorded reality in an effort to save Ruri, confronting the cost and instability of rewriting the past.

Story Structure — 5 Plot Phases

The Future Self's Warning

A yatagarasu leads the teenage Naomi to his adult self, who explains Alltale and Ruri's coma. Naomi accepts the mission and receives God's Hand.

Key Events

• Kyoto Preserved in Alltale — A government project records Kyoto's natural architecture and culture in Alltale. Location: Kyoto
• A Book Is Stolen — A mysterious yatagarasu steals Naomi's library book after school. Characters: Naomi Katagaki – now Location: Kyoto school library
• The Stranger Appears — Naomi meets a mysterious adult who reveals that he is Naomi from ten years ahead. Characters: Naomi Katagaki – now, Naomi Katagaki – future Location: Kyoto
• Ruri's Coma Revealed — The adult Naomi explains that Ruri was struck by lightning at a fireworks festival and fell into a coma. Characters: Naomi Katagaki – now, Naomi Katagaki – future, Ruri Ichigyou Location: Alltale
• God's Hand Given — The adult Naomi gives his younger self God's Hand, a power for creating objects of manageable complexity. Characters: Naomi Katagaki – now, Naomi Katagaki – future Location: Alltale

A Romance Rewritten

Following guidance from the adult Naomi's diary, the teenager grows closer to Ruri and they fall in love. On the festival night, he follows instructions to keep her away from the original incident.

Key Events

• God's Hand Given — The adult Naomi gives his younger self God's Hand, a power for creating objects of manageable complexity. Characters: Naomi Katagaki – now, Naomi Katagaki – future Location: Alltale
• Naomi Seeks Ruri's Affection — Guided by the adult Naomi's diary, the teenager gradually gains Ruri's affection. Characters: Naomi Katagaki – now, Naomi Katagaki – future, Ruri Ichigyou Location: Kyoto
• Naomi and Ruri Fall in Love — Naomi and Ruri eventually fall in love as he follows the adult Naomi's guidance. Characters: Naomi Katagaki – now, Ruri Ichigyou Location: Kyoto
• Naomi Stays Outside — On the night of the festival, Naomi refuses to invite Ruri and waits outside her house as instructed. Characters: Naomi Katagaki – now, Naomi Katagaki – future, Ruri Ichigyou Location: Outside Ruri's house

The System Fights Back

Alltale's Homeostatic System intervenes after Naomi changes the recorded events. He erases the lightning threat, but the adult Naomi takes Ruri away and disappears, revealing a more complicated plan.

Key Events

• Homeostatic System Activates — The altered events trigger Alltale's Homeostatic System, which moves Naomi and Ruri toward the incident site. Characters: Naomi Katagaki – now, Naomi Katagaki – future, Ruri Ichigyou Location: Alltale's 2024 Kyoto
• The Lightning Is Erased — Naomi creates a black hole that erases the kitsune men and the lightning strike that would have caused Ruri's accident. Characters: Naomi Katagaki – now, Ruri Ichigyou Location: The incident site
• Ruri Is Teleported Away — The adult Naomi reclaims God's Hand, teleports Ruri away, and disappears. Characters: Naomi Katagaki – now, Naomi Katagaki – future, Ruri Ichigyou Location: Alltale's 2024 Kyoto
• The Adult Naomi's Plan — Naomi realizes the adult's plan was to recreate Ruri's original mental state so Alltale data could sync with her comatose mind. Characters: Naomi Katagaki – now, Naomi Katagaki – future, Ruri Ichigyou Location: Alltale's 2024 Kyoto

Kyoto Comes Apart

The system reboots, kitsune men multiply, and Alltale's version of Kyoto begins to shift. Naomi enters the red space and receives God's Hand again from the yatagarasu.

Key Events

• The System Reboots — The system reboots after data relevant to Ruri's existence has been rewritten, and thousands of kitsune men appear. Characters: Naomi Katagaki – now Location: Alltale's 2024 Kyoto
• Kyoto Begins to Shift — As the system filters data, Kyoto shifts and red auroras appear in the sky. Characters: Naomi Katagaki – now Location: Alltale's 2024 Kyoto
• Naomi Enters the Redness — Remembering Ruri's teleportation, Naomi jumps into the red space. Characters: Naomi Katagaki – now Location: Alltale's 2024 Kyoto
• The Yatagarasu Returns — The yatagarasu assures Naomi he is alive and manifests God's Hand again to help him save Ruri. Characters: Naomi Katagaki – now Location: Virtual space

A Sacrifice Across Worlds

Ruri awakens in the real-world hospital, but the kitsune men pursue her and the two Naomis. The adult Naomi sacrifices himself, Alltale shuts down, and the younger Naomi reunites with Ruri before the final scene reveals a further twist.

Key Events

• Ruri Awakens in Reality — In the real world, the adult Naomi embraces Ruri after she wakes from her coma. Characters: Naomi Katagaki – future, Ruri Ichigyou Location: Real-world hospital room
• The Hospital Is Attacked — Kitsune men appear around the hospital room, and the younger Naomi arrives to take Ruri toward the Alltale complex staircase. Characters: Naomi Katagaki – now, Naomi Katagaki – future, Ruri Ichigyou Location: Real-world hospital room
• Ruri Returns Through a Portal — With the adult Naomi's help, they evade the kitsune men, and Ruri returns to her time through a portal. Characters: Naomi Katagaki – now, Naomi Katagaki – future, Ruri Ichigyou Location: Alltale Management Facility
• The Adult Naomi Sacrifices Himself — A gigantic creature overpowers the younger Naomi, and the adult Naomi sacrifices himself to save him. Characters: Naomi Katagaki – now, Naomi Katagaki – future Location: Alltale
• Alltale Is Shut Down — Alltale is shut down after its data goes haywire and begins duplicating itself. Characters: Naomi Katagaki – now, Naomi Katagaki – future Location: Alltale Management Facility
• Naomi and Ruri Reunite — Naomi returns to Ruri, and they share a kiss as a parallel world lies ahead. Characters: Naomi Katagaki – now, Ruri Ichigyou Location: A parallel world
• Naomi Awakens on the Moon — The adult Naomi awakens above a lunar human civilization as the yatagarasu and an adult Ruri are heard. Characters: Naomi Katagaki – future, Ruri Ichigyou Location: Moon

Story Breakdown

• Alltale Kyoto — The story introduces a recorded Kyoto whose data is stored in the Alltale quantum computer.
  • City Data Project — Drones record Kyoto's natural architecture and culture for preservation.
  • Naomi's Daily Life — The indecisive high school student is introduced as a reader living in Kyoto.
• The Future Self — A mysterious meeting reveals that an adult Naomi has entered Alltale to change the recorded past.
  • Stolen Library Book — A yatagarasu steals Naomi's book and leads him toward the stranger.
  • Ten Years Ahead — The stranger identifies himself as Naomi from the future.
• Saving Ruri — The adult Naomi explains the coma and asks his younger self to help change the events that led to it.
  • Lightning Accident — Ruri's coma is linked to the lightning strike at the fireworks festival.
  • God's Hand — The adult Naomi gives the teenager a power to create objects of manageable complexity.
• Growing Closer — Naomi follows the diary's guidance and develops a romantic relationship with Ruri.
  • Diary Guidance — The adult Naomi uses his diary to guide the teenager's approach.
  • Falling in Love — Naomi and Ruri eventually become a couple.
• The Festival Intervention — Naomi's effort to keep Ruri away from the incident triggers Alltale's corrective response.
  • Waiting Outside — Naomi refuses to invite Ruri to the festival and waits outside her house.
  • System Correction — The Homeostatic System moves Naomi and Ruri toward the incident site.
• The Adult's Hidden Plan — After Naomi averts the lightning strike, the adult Naomi takes Ruri away and leaves the younger Naomi to infer his purpose.
  • Lightning Erased — Naomi uses a black hole to erase the kitsune men and the lightning threat.
  • Mental State Sync — Naomi realizes the plan was to recreate Ruri's original mental state so Alltale data could sync with her comatose mind.
• Collapsing Kyoto — The system reboot destabilizes Alltale's Kyoto, driving Naomi into the changing space.
  • Kitsune Swarm — Thousands of kitsune men appear after the reboot.
  • Red Aurora — Data filtering shifts the space and brings red auroras into the sky.
• Hospital Escape — With Ruri awake in the real world, the two Naomis attempt to protect her from the kitsune men.
  • Ruri Awakens — The adult Naomi embraces Ruri after she wakes from her coma.
  • Portal to Her Time — The younger Naomi and Ruri reach a portal with help from the adult Naomi.
• Sacrifice and Shutdown — The adult Naomi gives his life during the final confrontation, and Alltale is shut down as its data becomes unstable.
  • One Naomi Remains — The adult Naomi sacrifices himself to save his younger self from the gigantic creature.
  • Alltale Deactivated — The facility shuts down the system after its data goes haywire and duplicates.
• A World Beyond — Naomi and Ruri reunite, while the final scene complicates the apparent resolution with a new revelation.
  • Naomi and Ruri Reunite — The pair share a kiss in a parallel world.
  • Awakening on the Moon — The adult Naomi awakens above a lunar civilization as the yatagarasu and an adult Ruri are heard.

Directed by

Tomohiko Ito

Key Cast

• Takumi Kitamura — Naomi Katagaki – now (voice)
• Tori Matsuzaka — Naomi Katagaki – future (voice)
• Minami Hamabe — Ruri Ichigyou (voice)
• Haruka Fukuhara — Misuzu Kadenokouji (voice)
• Minako Kotobuki — Xu Yiyi (voice)