Natsu e no Tunnel, Sayonara no Deguchi: Gunjou

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

mangaJPJP2020
Updated last week
Last deep analysis: never
Popular Love
2
Signal Breakdown
Social Sentiment
Cross Platform Breadth Reach
Reddit Volume Reach
Audience Score Reach
Reddit Engagement Reach
90-Day Trend
True Feel
93
Cult Favourite
--
Rising
--
Recommend
1
Reach Meter
5
Reach Breakdown
Platform Breadth
Reddit Volume
Audience Score
Reddit Reach
90-Day Reach Trend

1Core Metadata

Title & Origin
Canonical title
Natsu e no Tunnel, Sayonara no Deguchi: Gunjou
Original title
Not yet measured
Country
JP
Language
ja
Territory
JP
Release & Format
Format
MANGA
Release status
released
Release date
2020
Duration (min)
Not yet measured
Episodes
Not yet measured
Rights & Rating
Rating system
AniList
Rating
0.8
Licensing
Not yet measured
Distribution
Not yet measured
Volume count
Not yet measured
Creator
KoudonCreator
Alternate Titles
The Tunnel to Summer, the Exit of Goodbyes: Ultramarine
Original
夏へのトンネル、さよならの出口 群青
ปลายอุโมงค์แห่งคำบอกลาในหน้าร้อน: Ultramarine

2Content

Synopsis

Kaoru Touno 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.

Tags & Format

Themes

DramaRomanceSupernatural

Tone

Not yet measured

Content Warnings

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Target age rating
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Content format
serial
Awards

Not yet measured

3Commercial Metrics

Box Office
Box office
Not yet measured
Currency
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Original
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Revenue
Total revenue
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Revenue tier
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Awards
Not yet measured
Sales & Streams
Units sold
Not yet measured
Streams
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Rights
Rights status
Not yet measured
Distribution
Not yet measured
Revenue tier
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4Audience Intelligence

anilist
Score
0.8
Score count
Not yet measured
Rank
Not yet measured
Audience size
2,670
reddit
Score
21.0
Score count
1
Rank
1
Audience size
30
Last updated
6/11/2026

5Industry Links

MyAnimeList

myanimelist

AniList

anilist

6Community Sentiment

How people are talking about this IP — each row is a different signal: reviews, ratings or comments from one source.

Positive ≥0.6Mixed 0.4–0.6Negative <0.4
How sentiment scores are calculated