Character Relationship Map: Fireworks

Characters

• Nazuna Oikawa (played by Suzu Hirose) — protagonist

  Female protagonist involved in a bet about fireworks. Competes in a swimming race, elopes with Norimichi, and experiences multiple timeline resets via a magic marble before disappearing.

• Norimichi Shimada (played by Masaki Suda) — protagonist

  Male protagonist who discovers a time-rewinding magic marble. Uses it repeatedly to alter events and escape with Nazuna through alternate realities, ultimately vanishing with her.

• Yūsuke Azumi (played by Mamoru Miyano) — supporting

  Schoolmate who wins the initial swimming race and is asked out by Nazuna. Later abandons the date and actively interferes with the protagonists' escape attempts during timeline resets.

• Norimichi's Father (voice) (played by Nobuo Tobita) — supporting
• Nazuna's Mother's Fiancé (played by Shin-ichiro Miki) — supporting

  Mentioned as accompanying Nazuna's mother to intercept and return the protagonists to their homes during their elopement attempts in the timeline resets.

• Yūsuke's Father (voice) (played by Mitsuru Miyamoto) — minor
• Nazuna's Mother (voice) (played by Takako Matsu) — minor
• Norimichi's Mother (played by Michiko Neya) — supporting

Canonical Relationships

Family, romantic, and professional connections based on plot evidence.

• Nazuna's Mother (voice) → Nazuna Oikawa (mother)
• Yūsuke's Father (voice) → Yūsuke Azumi (father)
• Norimichi's Father (voice) → Norimichi Shimada (father)
• Norimichi's Mother → Norimichi Shimada (mother)
• Nazuna's Mother's Fiancé → Nazuna Oikawa (mother)
• Nazuna Oikawa → Norimichi Shimada (Romantic Interest) — Their relationship develops from mutual attraction into an attempted romantic escape.

  Nazuna asks Norimichi to go on a date after he wins the swimming race in the altered timeline, and the two attempt to escape together.

Story Analysis

Nazuna and Norimichi repeatedly challenge an unstable reality in order to escape together.

Plot Progression

1. A Bet Beneath Fireworks — The students debate the shape of fireworks while Nazuna and Norimichi encounter a strange glass marble. A swimming race and a date proposal begin the personal conflict.
2. The First Broken Timeline — Nazuna leaves home with a suitcase, but the planned date fails and she is taken back. Norimichi throws the marble and discovers that time can be rewound.
3. Running Toward Departure — Norimichi wins the altered race and accepts Nazuna's invitation. Their journey to the station is interrupted, while the flat fireworks reveal that reality has changed.
4. Wishes Against Capture — Norimichi makes another wish from the lighthouse and helps Nazuna board the train. They are caught again, forcing him to use the marble once more.
5. The Dome Beyond Tomorrow — The final wish sends the train along a different route and leaves the pair in a glass-encapsulated town. The marble explodes as a firework, and a shard reveals a possible future before they disappear...