Rainbow Days (2018) — AI Story Visualization

Plot Analysis Summary

Four friends navigate romance, insecurity, academic choices, and graduation across their final school years.

Story Structure — 5 Plot Phases

A Towel Starts Everything

Natsuki meets Anna after falling into a puddle, but Mari immediately becomes protective. The boys turn Natsuki's romantic uncertainty into a bet.

Key Events

• Second Year Begins — Four best friends begin their second year of high school. Characters: Natsuki Hashiba, Tomoya Matsunaga, Tsuyoshi Naoe, Keiichi Katakura Location: High school
• Natsuki Meets Anna — Anna lends Natsuki a hand towel after he falls into a puddle. Characters: Natsuki Hashiba, Anna Kobayakawa Location: School grounds
• Mari Blocks Natsuki — Mari intercepts Natsuki when he tries to return Anna's towel. Characters: Natsuki Hashiba, Anna Kobayakawa, Mari Tsutsui Location: School grounds
• The Dating Bet — The boys bet that Natsuki will ask Anna out before the semester ends. Characters: Natsuki Hashiba, Tomoya Matsunaga, Tsuyoshi Naoe, Keiichi Katakura Location: High school
• Anna Shares Her ID — Natsuki gets Anna's Line ID, angering her protective friend Mari. Characters: Natsuki Hashiba, Anna Kobayakawa, Mari Tsutsui Location: High school

Summer Tests and Bonds

The boys fail their exams and depend on Tsuyoshi and Yukiko for help. The summer festival brings the group closer while exposing Mari's fear of losing Anna.

Key Events

• Failed Summer Exams — Natsuki, Tomoya, and Keiichi fail their exams and need remedial help. Characters: Natsuki Hashiba, Tomoya Matsunaga, Keiichi Katakura Location: High school
• Remedial Study Group — Tsuyoshi and Yukiko help the boys study, with Anna also invited. Characters: Natsuki Hashiba, Tomoya Matsunaga, Keiichi Katakura, Tsuyoshi Naoe, Yukiko Asai, Anna Kobayakawa Location: Study room
• Tokyo University Doubt — Yukiko discovers that Tsuyoshi may apply to a university in Tokyo. Characters: Tsuyoshi Naoe, Yukiko Asai Location: Study room
• Remedial Exams Passed — The boys pass their remedial exams after receiving help. Characters: Natsuki Hashiba, Tomoya Matsunaga, Keiichi Katakura, Tsuyoshi Naoe, Yukiko Asai Location: High school
• Summer Festival Outing — The boys attend a summer festival with Anna, Mari, and Yukiko. Characters: Natsuki Hashiba, Tomoya Matsunaga, Keiichi Katakura, Tsuyoshi Naoe, Anna Kobayakawa, Mari Tsutsui, Yukiko Asai Location: Summer festival

Choices and Misunderstandings

Tsuyoshi struggles with university decisions, while Anna becomes confused by Natsuki's closeness to another classmate. Keiichi protects Anna by pretending to be her boyfriend.

Key Events

• Mari Fears Losing Anna — Tomoya learns that Mari fears he will take Anna away from her. Characters: Tomoya Matsunaga, Anna Kobayakawa, Mari Tsutsui Location: Summer festival
• Tsuyoshi Faces Choices — Tsuyoshi struggles between university options and his relationship with Yukiko. Characters: Tsuyoshi Naoe, Yukiko Asai Location: High school
• Anna Misunderstands Natsuki — Anna becomes confused after seeing Natsuki close to a female classmate. Characters: Natsuki Hashiba, Anna Kobayakawa Location: High school
• Keiichi Protects Anna — Keiichi pretends to be Anna's boyfriend to stop unwanted advances. Characters: Keiichi Katakura, Anna Kobayakawa Location: School grounds

Winter Confessions

Mari runs away after misreading the birthday surprise, leading to emotional confessions and accidental kisses. Tomoya then openly proves that his love for Mari is genuine.

Key Events

• Birthday Party Surprise — Mari discovers that the Christmas party is a surprise birthday celebration for her. Characters: Natsuki Hashiba, Tomoya Matsunaga, Anna Kobayakawa, Mari Tsutsui Location: Christmas party
• Mari Runs Away — Upset by her insecurity, Mari runs away and everyone searches for her. Characters: Natsuki Hashiba, Tomoya Matsunaga, Anna Kobayakawa, Mari Tsutsui Location: Town streets
• Two Accidental Kisses — Tomoya kisses Mari, while Natsuki accidentally kisses Anna during the search. Characters: Tomoya Matsunaga, Natsuki Hashiba, Anna Kobayakawa, Mari Tsutsui Location: Town streets
• Tomoya Declares Love — Tomoya admits that he loves Mari and proves his sincerity by deleting other girls' phone numbers. Characters: Tomoya Matsunaga, Mari Tsutsui Location: Nurse's office

The Rainbow After Rain

Anna misinterprets Natsuki's rehearsal and withdraws from him. Keiichi's final deception gives Natsuki and Anna the chance to confess their love before the rainbow and graduation.

Key Events

• Cultural Festival Misread — Anna overhears Natsuki rehearsing a play and mistakes his words for a love confession. Characters: Natsuki Hashiba, Anna Kobayakawa Location: Cultural festival
• Keiichi Challenges Natsuki — Keiichi claims he will pursue Anna, causing conflict before Tsuyoshi warns Natsuki. Characters: Natsuki Hashiba, Tomoya Matsunaga, Tsuyoshi Naoe, Keiichi Katakura, Anna Kobayakawa Location: Cultural festival
• Planetarium Confession — Keiichi reveals his threat was a ruse, giving Natsuki and Anna time to confess and kiss. Characters: Natsuki Hashiba, Anna Kobayakawa, Keiichi Katakura Location: Planetarium exhibit
• Rainbow and Graduation — A rainbow appears after the rain; the boys later jump into the pool and graduate. Characters: Natsuki Hashiba, Tomoya Matsunaga, Tsuyoshi Naoe, Keiichi Katakura, Anna Kobayakawa, Mari Tsutsui, Yukiko Asai Location: School swimming pool

Story Breakdown

• Four Friends Reunite — The story establishes the close friendship among four boys entering another school year.
  • Second Year Begins — Natsuki, Tomoya, Tsuyoshi, and Keiichi approach their second year of high school.
  • The Group's Bet — The boys bet that Natsuki will ask Anna out before the semester ends.
• Natsuki Meets Anna — A small act of kindness starts Natsuki's romance with Anna and triggers Mari's protectiveness.
  • The Hand Towel — Anna lends Natsuki a towel after he falls into a puddle.
  • Mari Intervenes — Mari blocks Natsuki's attempt to return the towel and becomes angry about his approach to Anna.
• Summer Bonds Strengthen — Academic failure brings the group together while the summer outing reveals hidden romantic concerns.
  • Remedial Studying — Tsuyoshi and Yukiko help the boys prepare for remedial exams.
  • Festival Tensions — The summer festival brings the boys and girls together as Mari worries about Anna.
• Future Choices Fracture — University decisions and romantic misunderstandings create uncertainty among the friends.
  • Tokyo University Plan — Tsuyoshi becomes conflicted about applying to a university in Tokyo while dating Yukiko.
  • Anna Feels Jealous — Anna misreads Natsuki's closeness to a female classmate and becomes confused.
• Winter Feelings Surface — A surprise party and a frantic search force Mari and Tomoya to confront their feelings.
  • Birthday Party Escape — Mari runs away after discovering the birthday surprise and feeling displaced in Anna's life.
  • Tomoya's Sincere Love — Tomoya admits his love and demonstrates commitment by deleting other girls' phone numbers.
• Festival Misunderstanding — A rehearsal at the cultural festival causes Anna to withdraw from Natsuki.
  • A Misheard Confession — Anna mistakes Natsuki's rehearsal conversation for a confession to another girl.
  • Distance Between Them — Anna begins ignoring Natsuki and puts emotional distance between them.
• Planetarium Resolution — Keiichi's apparent rivalry becomes a final act of friendship that enables Natsuki and Anna's confession.
  • Keiichi's False Threat — Keiichi claims he will pursue Anna, then reveals the threat was a ruse.
  • Love and Rainbow — Natsuki and Anna confess and kiss, followed by a rainbow, a pool jump, and graduation.

Directed by

Ken Iizuka

Key Cast

• Reo Sano — Natsuki Hashiba
• Taishi Nakagawa — Tomoya Matsunaga
• Mahiro Takasugi — Tsuyoshi Naoe
• Ryusei Yokohama — Keiichi Katakura
• Ai Yoshikawa — Anna Kobayakawa