Aliases
Niji-iro Hotaru: Eien no Natsuyasumi, Rainbow-colored Firefly: Never Ending Summer Vacation, Niji-Iro Hotaru ~Eien no Natsu Yasumi~, Rainbow-Colored Fireflies: The Eternal Summer Vacation, Nijiiro Hotaru: Eien no Natsuyasumi, 虹色ほたる~永遠の夏休み~, Rainbow Fireflies
S1 (Movie)SPRING 2012MOVIE
Part of this franchise
concluded
Announced
In production
Releasing
Completed
Yuuta was 12-year-old boy, who had lost his father in the traffic accident one year ago. In the summer vacation, he visited a deserted dam deep in the mountains, where he had a good time with his father before.
Suddenly a thunder storm occurred and he slipped on the ground. He lost consciousness and woke up to find a girl and an unfamiliar village. He time-traveled 30 years and reached a village, which sank at the bottom of the dam.
This is Yuuta's precious memory of "another" summer vacation.
Suddenly a thunder storm occurred and he slipped on the ground. He lost consciousness and woke up to find a girl and an unfamiliar village. He time-traveled 30 years and reached a village, which sank at the bottom of the dam.
This is Yuuta's precious memory of "another" summer vacation.
Last updated
Aug 30, 2026, 07:40 PM
Franchise overview
Franchise timeline
Review every Courcast-tracked season for this series and jump between entries.
Renewal pulse
Courcast score breakdown
CourScore is the probability of an official sequel announcement within 18 months, blending attention velocity, completion strength, and catalogue health.
CourScore
50.8
CourScore is the probability of an official sequel announcement within 18 months.
Signal coverage: 100% • Signal freshness: High • Updated 12 days ago
Top reasons
- Cross-platform audience rating - Weighted audience rating 69.0
- Crunchyroll Like Index - 1,422 likes / 1,485 reactions on recent episodes
- Trailer reception (YouTube) - Official trailer has 317,123 views
Runway
Low
Source runway looks tight, so near-term sequel odds are capped.
Financial & Commercial51
Production Feasibility39
Audience Reception63
Strategic Priors37
Fandom Engagement76
CourScore history
CourScore over time
Last analysedAug 30, 2026, 07:40 PM
Next scheduled11 days ago
Renewal FAQ
Nijiiro Hotaru: Eien no Natsuyasumi renewal questions
Common questions about this title's renewal prospects, answered by Courcast's daily analysis.
- Is Nijiiro Hotaru: Eien no Natsuyasumi getting a new season?
- According to Courcast's latest analysis, Nijiiro Hotaru: Eien no Natsuyasumi has a 51% renewal probability. This score is updated daily and blends fandom momentum, streaming signals, source-material runway, and franchise history. Check back regularly for the latest forecast.
- Will Nijiiro Hotaru: Eien no Natsuyasumi be renewed?
- Nijiiro Hotaru: Eien no Natsuyasumi currently scores 51 out of 100 on Courcast. Signals driving this estimate include online discussion volume, sequel history within the franchise, and platform engagement data - all recalculated daily. Titles scoring above 70 are considered Very Likely to receive a continuation.
- What is Nijiiro Hotaru: Eien no Natsuyasumi's renewal probability?
- Nijiiro Hotaru: Eien no Natsuyasumi's CourScore is 51 as of the latest update. CourScore is Courcast's proprietary metric that aggregates over a dozen renewal signals - from source-material runway to social buzz - into a single daily-updated probability out of 100.
Latest signals
Fresh telemetry
Courcast watches every connected signal to surface the freshest indicators of momentum.
| Source | Metric | Geo | Value | Collected |
|---|---|---|---|---|
| anilist | average score | GLOBAL | 67 | Aug 25, 2026, 12:00 AM |
| anilist | favorites | GLOBAL | 35 | Aug 25, 2026, 12:00 AM |
| anilist | popularity | GLOBAL | 3,459 | Aug 25, 2026, 12:00 AM |
| anilist | trending | GLOBAL | 0 | Aug 25, 2026, 12:00 AM |
| crunchyroll | episode count | GLOBAL | 12 | Sep 8, 2026, 12:00 AM |
| crunchyroll | episode dislikes | GLOBAL | 63 | Sep 8, 2026, 12:00 AM |
| crunchyroll | episode likes | GLOBAL | 1,422 | Sep 8, 2026, 12:00 AM |
| crunchyroll | series available | GLOBAL | 1 | Sep 8, 2026, 12:00 AM |
| google trends | interest daily | GLOBAL | 0 | Jul 10, 2026, 12:00 AM |
| google trends | interest weekly | GLOBAL | 0 | Aug 30, 2026, 12:00 AM |
| kitsu | favorites | GLOBAL | 1 | Sep 8, 2026, 12:00 AM |
| kitsu | member count | GLOBAL | 944 | Sep 8, 2026, 12:00 AM |
| kitsu | rating rank | GLOBAL | 5,167 | Sep 8, 2026, 12:00 AM |
| kitsu | score mean | GLOBAL | 70.59 | Sep 8, 2026, 12:00 AM |
| mal | chapters total | GLOBAL | 11 | Aug 27, 2026, 12:00 AM |
| mal | completed | GLOBAL | 3,026 | Sep 8, 2026, 12:00 AM |
| mal | members | GLOBAL | 9,029 | Sep 8, 2026, 12:00 AM |
| mal | plan to watch | GLOBAL | 5,346 | Sep 8, 2026, 12:00 AM |
| mal | source members | GLOBAL | 90 | Aug 27, 2026, 12:00 AM |
| mal | source status code | GLOBAL | 3 | Aug 27, 2026, 12:00 AM |
| mal | volumes total | GLOBAL | 1 | Aug 27, 2026, 12:00 AM |
| mal | watching | GLOBAL | 353 | Sep 8, 2026, 12:00 AM |
| mangaupdates | bayesian rating | GLOBAL | 6.31 | Sep 10, 2026, 12:00 AM |
| niconico | episode comments | JP | 103 | Sep 8, 2026, 12:00 AM |
| niconico | episode mylists | JP | 45 | Sep 8, 2026, 12:00 AM |
| niconico | episode views | JP | 7,350 | Sep 8, 2026, 12:00 AM |
| shikimori | completion ratio | GLOBAL | 0.33 | Aug 25, 2026, 12:00 AM |
| shikimori | member count | GLOBAL | 1,779 | Aug 25, 2026, 12:00 AM |
| shikimori | score mean | GLOBAL | 69.8 | Aug 25, 2026, 12:00 AM |
| wikipedia | pageviews daily | EN.WIKIPEDIA | 3 | Aug 18, 2026, 12:00 AM |
| youtube | channel views total | GLOBAL | 260,870 | Jun 17, 2026, 12:00 AM |
| youtube | subscribers total | GLOBAL | 1,290 | Jun 17, 2026, 12:00 AM |
| youtube | trailer likes | GLOBAL | 1,694 | Sep 8, 2026, 12:00 AM |
| youtube | trailer views | GLOBAL | 317,510 | Sep 8, 2026, 12:00 AM |
| youtube | uploads 30d | GLOBAL | 25 | Jun 17, 2026, 12:00 AM |
| youtube | uploads 7d | GLOBAL | 25 | Jun 17, 2026, 12:00 AM |
| youtube | views 30d | GLOBAL | 13,579 | Jun 17, 2026, 12:00 AM |
| youtube | views 7d | GLOBAL | 13,579 | Jun 17, 2026, 12:00 AM |