Character Relationship Map: Drifting Home

Characters

• Kosuke Kumagaya (played by Mutsumi Tamura) — protagonist

  11-year-old protagonist who grew up like a sibling to Natsume. His relationship with her strains after his grandfather's death. He leads classmates into a demolition-bound housing complex, reunites wi...

• Natsume Tonai (played by Asami Seto) — protagonist

  11-year-old girl who grew up like a sibling to Kosuke. Their bond weakens following Kosuke's grandfather's passing. She is unexpectedly found by Kosuke inside the abandoned complex, where she shares i...

• Noppo (played by Ayumu Murase) — supporting

  A mysterious boy residing within the abandoned housing complex. His existence is discovered by Kosuke and Natsume during their exploration, serving as a key plot element that draws the children deeper...

• Taishi Koiwai (played by Yumiko Kobayashi) — supporting

  One of Kosuke's classmates who accompanies him into the demolition-slated housing complex. Engages in the group's conflict and witnesses the supernatural drifting phenomenon alongside the others.

• Reina Haba (played by Inori Minase) — supporting

  One of Kosuke's classmates who enters the abandoned complex with the group. Her presence contributes to the collective experience of the argument, rain, and the floating building.

• Juri Ando (played by Kana Hanazawa) — supporting

  One of Kosuke's classmates who sneaks into the housing complex. Participates in the group's argument and witnesses the supernatural drifting event alongside the others.

• Yasuji Kumagaya (played by Bin Shimada) — supporting

  Kosuke's deceased grandfather. His passing is the pivotal event that strains the relationship between Kosuke and Natsume, providing emotional context for the story.

• Satoko Tonai (played by Nana Mizuki) — supporting

Canonical Relationships

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

• Yasuji Kumagaya → Natsume Tonai (Family Connection)

  Natsume says she blames herself for Kosuke missing the chance to say goodbye to his grandfather, Yasuji.

• Natsume Tonai → Satoko Tonai (Family)

  Natsume reflects on her mother while confronting her feelings about the family she believes she intruded upon; Satoko Tonai is listed as a supporting...

• Kosuke Kumagaya → Yasuji Kumagaya (Family Grandson And Grandfather)

  Yasuji is identified as Kosuke's deceased grandfather, whose passing is pivotal to the strain between Kosuke and Natsume. Natsume blames herself for K...

Story Dynamics

Alliances, conflicts, and narrative interactions that evolve throughout the story.

• Kosuke Kumagaya → Juri Ando (Social Classmates)

  Juri sneaks into the housing complex with the group, and the children later rescue her when she is in danger.

• Kosuke Kumagaya → Reina Haba (Social Classmates)

  Reina enters the abandoned complex with Kosuke's group and suspects Natsume is hiding something.

• Kosuke Kumagaya → Taishi Koiwai (Social Classmates)

  Taishi accompanies Kosuke into the demolition-bound complex, and the group later rescues Taishi when he is in danger.

• Kosuke Kumagaya → Noppo (Narrative Mysterious Acquaintances)

  Kosuke and Natsume encounter Noppo while exploring the abandoned complex.

• Natsume Tonai → Noppo (Alliance Mysterious Companion)

  Natsume says Noppo is inside the building, and she chooses to stay behind with him when the others leave.

• Kosuke Kumagaya → Natsume Tonai (Social Estranged Childhood Friends)

  They grew up like siblings, but their bond weakened after Kosuke's grandfather died. Kosuke avoids Natsume, and they argue about her secrecy during th...

Story Analysis

A group of children stranded in a drifting apartment complex face danger while grief and a fractured childhood bond shape their choices.

Plot Progression

1. A Home Left Behind
2. The Ocean Takes the Building
3. Survival and Fraying Bonds
4. The Storm and Separation
5. Hope and Unfinished Guilt