Natsu e no Tunnel, Sayonara no Deguchi (English: The Tunnel to Summer, the Exit of Goodbyes ) is a poignant coming-of-age story that explores themes of grief, regret, and the high cost of holding onto the past. Originally a light novel by Mei Hachimoku, it was adapted into an award-winning anime film in 2022 directed by Tomohisa Taguchi.

So, should you spend your time with Natsu e no Tunnel, Sayonara no Deguchi ? If you're a fan of emotionally driven anime like Your Name. or The Girl Who Leapt Through Time , the answer is a resounding yes. While it may not have the blockbuster budget of a Makoto Shinkai film, it excels at creating a quiet, intimate atmosphere that feels more personal.

The story is set in a quiet rural town rumored to contain the "Urashima Tunnel," a local urban legend. The tunnel operates on the folklore principle of Urashima Taro: time passes differently inside than outside. However, the specifics are inverted. Inside the tunnel, time nearly stands still, but for every few seconds spent within, years pass in the outside world.

Fans of the experience often seek differences between the film and the original novel by Mei Hachimoku (illustrated by Kukka).

Natsu e no Tunnel, Sayonara no Deguchi is a shining example of "quiet" anime. It doesn't rely on explosive action or over-the-top melodrama. Instead, it relies on the quiet emotional resonance of two people finding comfort in each other while facing the impossibilities of time.

The title— Natsu e no Tunnel, Sayonara no Deguchi —translates to . At its core, the story is a single-volume Japanese light novel written by Mei Hachimoku and illustrated by Kukka . It was first published by Shogakukan under its Gagaga Bunko imprint on July 18, 2019 . What started as a critically acclaimed light novel quickly expanded into a broader universe: a manga adaptation, titled The Tunnel to Summer, the Exit of Goodbyes: Ultramarine and illustrated by Koudon, was serialized from July 2020 to November 2021 and later collected in four volumes. The story’s popularity also paved the way for a feature-length anime film, which was released in Japan on September 9, 2022 .

A confident and talented artist who serves as a catalyst for Kaoru's growth. She is forward-thinking and challenges Kaoru to break out of his shell. Karen Tono: Kaoru's late sister, whose memory haunts him. Koharu Kawasaki: Anzu's friend.

The film’s non-linear timeline and metaphysical rules can be confusing. Viewers search for a full plot breakdown to understand the ending: Does Kaoru stay in the tunnel? Does Anzu die of old age? (Spoiler: She waits, and they reunite as young adults after Kaoru sacrifices his wish to save her).

The story then follows their summer-long investigation, where they are forced to confront the price of their wishes. As each of them enters the tunnel repeatedly, they must decide what they are truly willing to sacrifice.

The film takes place in a small Japanese town, where we meet our three protagonists: Aoi, a free-spirited and adventurous high school student; Dai, a charming and laid-back musician; and Minami, a quiet and introspective bookworm. The three friends have been inseparable since childhood, sharing their joys, sorrows, and secrets with each other.

It grants a wish related to what was lost or desired most deeply.

Produced by CLAP, the animation is a highlight of the film, with stunning, vibrant colors that perfectly capture the feeling of a Japanese summer. The contrast between the mundane, sunny real world and the fantastical, dimly lit, underwater-like feel of the tunnel is expertly crafted.