E No Tunnel Sayonara No Deguchi Full: Natsu

Time as a Currency
The film’s most powerful metaphor is the tunnel itself. Time becomes a tangible resource. A few minutes outside might be a week inside. This creates agonising choices: how much of your remaining life is a wish worth?

Regret and Guilt
Kaoru’s arc is driven by survivor’s guilt. He believes he caused Sae’s accident and that his family would be better without him. The tunnel offers escape – not from grief, but into it. The film argues that running from pain only steals more of your future.

Sacrificial Love
Unlike typical fantasy romances, the bond between Kaoru and Anzu is built on mutual recognition of pain. Their climactic decision – whether to stay in the tunnel or return – forces them to weigh personal desire against genuine care for another person.

The Bittersweet Nature of Growing Up
The tunnel is a metaphor for adolescence itself: a liminal space where you can try to skip the hard parts, but you’ll miss everything that matters. The film insists that goodbyes are not failures but necessary exits.

The film’s final act is its strongest. The inevitable separation of the characters due to the time distortion is heartbreaking. When Kaoru enters the tunnel for the final time, the stakes are existential. The resolution—Kaoru emerging years older in biological age while Anzu has lived through those years waiting—is a mature take on the "time skip" trope.

It serves as a powerful thesis statement: You cannot undo the past, and trying to do so robs you of your present. The "Exit of Goodbyes" in the title refers not just to saying goodbye to the dead, but saying goodbye to the version of oneself that is defined by tragedy. The ending is bittersweet but hopeful, showing that a life scarred by loss is still worth living. natsu e no tunnel sayonara no deguchi full

| Element | The Tunnel… | Your Name | Penguin Highway | |--------|--------------|-------------|-------------------| | Grief source | Sibling death | Romantic separation | Childhood wonder lost | | Fantasy mechanic | Time-debt tunnel | Body swapping | Penguins / reality holes | | Resolution | Stoic acceptance | Hopeful reunion | Bittersweet growth | | Target mood | Melancholic calm | Epic romance | Whimsical mystery |

The film sits closest to Penguin Highway in tone—both are about kids using impossible phenomena to avoid facing ordinary pain—but Tunnel is far bleaker.

Strengths:

If you are looking for the musical pieces from the film " The Tunnel to Summer, the Exit of Goodbyes

" (Natsu e no Tunnel, Sayonara no Deguchi), the full collection primarily features tracks by the artist eill and the composer Harumi Fuuki .  Key Vocal Tracks by eill  Time as a Currency The film’s most powerful

"Finale." (フィナーレ。): The main theme song used for the ending of the movie.

"Pre-Romance" (プレロマンス): An energetic insert song featured during the film's development.

"Katappo - Acoustic Version" (片っぽ): Another emotional insert track included in the official soundtrack.  Original Soundtrack (OST)  The background score was composed by Harumi Fuuki and includes several key atmospheric pieces: 

"Summer Days": Often cited as a primary motif for the film's setting.

"Sunflower Field": A melodic piece reflecting the visual themes of the story. If you are looking for the musical pieces

"The Tunnel to Summer, the Exit of Goodbyes": The titular orchestral track that encapsulates the movie's mystery.  Where to Listen 

You can find the full soundtrack and individual singles on major streaming platforms: 

フィナーレ。(Finale.) (Romanized) Lyrics - eill - Genius

eill - フィナーレ。 (Finale.) (Romanized) * 日本語 (Japanese) * English. Genius

Here’s an in-depth look at Natsu e no Tunnel, Sayonara no Deguchi (The Tunnel to Summer, the Exit of Goodbyes), the 2022 anime film based on the novel by Mei Hachimoku.

Adapted from the award-winning novel by Mei Hachimoku, The Tunnel to Summer, the Exit of Goodbyes is a cinematic anomaly. In a genre often saturated with melodramatic romance and supernatural high school tropes, this film distinguishes itself through a somber tone, mature character writing, and a sci-fi concept that serves as a poignant metaphor for grief. It is not just a love story; it is a study on the paralysis of loss and the terrifying courage required to move forward.

Summer in anime represents freedom, adolescence, and fleeting beauty. By setting the story in summer, the film argues that youth itself is a kind of tunnel—you enter naive, and you exit as an adult, often losing something precious along the way.