Natsu e no Tunnel, Sayonara no Deguchi: Gunjou
The Tunnel to Summer, the Exit of Goodbyes: Ultramarine
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Natsu e no Tunnel, Sayonara no Deguchi: Gunjou
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Alternative Titles

Japanese: 夏へのトンネル、さよならの出口 群青
English: The Tunnel to Summer, the Exit of Goodbyes: Ultramarine
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Information

Type: Manga
Volumes: 4
Chapters: 17
Status: Finished
Published: Jul 11, 2020 to Oct 16, 2021
Genres: Drama Drama, Mystery Mystery, Sci-Fi Sci-Fi
Serialization: MangaONE
Authors: Koudon (Art), Hachimoku, Mei (Story)

Statistics

Score: 8.111 (scored by 12011,201 users)
1 indicates a weighted score.
Ranked: #5872
2 based on the top manga page. Please note that 'R18+' titles are excluded.
Popularity: #4356
Members: 5,338
Favorites: 89

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Natsu e no Tunnel, Sayonara no...
8.11
Ranked #587Popularity #4356Members 5,338
MangaMangaONEKoudon (Art), Hachimoku, Mei (Story)
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Volumes: /4
Chapters: /17

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Synopsis

Kaoru Tono heard a rumor: The laws of space and time mean nothing to the Urashima Tunnel. If you find it, walk through and you'll find your heart's desire on the other side...in exchange for years of your own life. On the night Kaoru just so happens to find himself standing in front of a tunnel that looks suspiciously like the one the rumor describes, he finds himself thinking of Karen, the sister he lost in an accident five years ago. To Kaoru's surprise, he's been followed by the new transfer student Anzu Hanaki, who promises to help him experiment with the mysterious tunnel—but what does she want from Kaoru in exchange? And what will he have left to give, after the tunnel's done with him?

(Source: Seven Seas Entertainment)

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Background

Natsu e no Tunnel, Sayonara no Deguchi: Gunjou was published in English as The Tunnel to Summer, the Exit of Goodbyes: Ultramarine by Seven Seas Entertainment from August 9, 2022 to June 13, 2023.
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Natsu e no Tunnel, Sayonara no Deguchi
Adaptation (Light Novel)
Natsu e no Tunnel, Sayonara no Deguchi
Natsu e no Tunnel, Sayonara no Deguchi
Adaptation (Movie)
Natsu e no Tunnel, Sayonara no Deguchi

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More characters
Characters

Hanashiro, Anzu
Hanashiro, Anzu
Main
Touno, Kaoru
Touno, Kaoru
Main
Touno, Karen
Touno, Karen
Main
Kawasaki, Koharu
Kawasaki, Koharu
Main
Kaga, Shouhei
Kaga, Shouhei
Supporting

Reviews

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5 Recommended
0 Mixed Feelings
0 Not Recommended
All reviews (5)
Apr 30, 2025
Eze-Z
Recommended
A very beautiful story with a meaningful message.

The characters are very interesting, and the way they faced their problems/traumas and emotions was portrayed realistically. The mystery of the tunnel and how they dealt with its existence and discovered how it worked was also very interesting and realistic.
I really enjoyed reading this manga, and the ending was satisfying.

The art is very good, with nothing to complain about.

I saw the movie first, this manga is superior to the movie and the story is more developed (although the light novel is the original source anyway, unfortunately it is not available in my language). I loved this manga and, ...
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Sep 19, 2024
eleven_exists
Recommended
This isn't a perfect adaptation of the light novel, but it's miles better than the movie. Character designs are a bit questionable at times, especially for more close up shots, but it doesn't impact the reading experience much. I do think there was a lot more comedy added compared to the light novel, which kinda makes the emotional scenes less emotional. The characters do feel pretty similar to their ln counterparts, and are actually expressive, unlike in the movie. Just don't watch the movie. I beg of you 🙏

Overall is a good adaptation and definitely worth the read if lns aren't your thing. If you're ...
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May 21, 2024
CarbonRuiner
Recommended
Preliminary (12/17 eps)
This manga is very good. It is incredible that having only four volumes it manages in the first two chapters to create an intrigue that you want to know more about. Also the characters grow on you as if you knew them from many more previous chapters.

It is really well written, condensed into a short manga a complex and deep story with ease. (note that I didn't read the light novel in which it is based. In fact I just discover there is a light novel because of this manga).

The premise is quite interesting and original. And when you find out more about it it's ...
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