Aliases
Fastening Days 2, Fastening Days 3, Fastening Days 4, FASTENING DAYS
S1FALL 2014ONA
Part of this franchise
concluded
Announced
In production
Releasing
Completed
Youji and Kei, a boy and girl, live in a town in the not-so-distant future with their foster parent, Anna. But these seemingly ordinary children have a
secret hidden even from their unsuspecting mother: Youji and Kei are superhero defenders of their town!
With a flap of their capes, the two of them and their robot bear sidekick, Oscar, protect the citizens in their town with their handmade high-tech machinery.
But from what menace?
And will our little heroes be able to overcome the crisis about to threaten the town's peaceful everyday serenity?
This entry contains the following:
- Fastening Days 1 (1 episode) - Oct, 2013
- Fastening Days 2 (1 episode) - Aug, 2016
- Fastening Days 3 (3 episodes) - Sept, 2017
- Fastening Days 4 (3 episodes) - Dec, 2019
With a flap of their capes, the two of them and their robot bear sidekick, Oscar, protect the citizens in their town with their handmade high-tech machinery.
But from what menace?
And will our little heroes be able to overcome the crisis about to threaten the town's peaceful everyday serenity?
This entry contains the following:
- Fastening Days 1 (1 episode) - Oct, 2013
- Fastening Days 2 (1 episode) - Aug, 2016
- Fastening Days 3 (3 episodes) - Sept, 2017
- Fastening Days 4 (3 episodes) - Dec, 2019
Last updated
Aug 30, 2026, 03:32 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
45.9
CourScore is the probability of an official sequel announcement within 18 months.
Signal coverage: 100% • Signal freshness: Medium • Updated 12 days ago
Top reasons
- Cross-platform audience rating - Weighted audience rating 69.0
- Crunchyroll Like Index - 9,878 likes / 11,684 reactions on recent episodes
- Key staff availability - Director Moaang has no other concurrent active productions
Runway
Anime original
This is an anime original, not an adaptation, so there is no source material to run down - renewal turns on sales and popularity rather than runway.
Financial & Commercial48
Production Feasibility49
Audience Reception60
Strategic Priors25
Fandom Engagement23
CourScore history
CourScore over time
Last analysedAug 30, 2026, 03:32 PM
Next scheduled11 days ago
Renewal FAQ
FASTENING DAYS renewal questions
Common questions about this title's renewal prospects, answered by Courcast's daily analysis.
- Is FASTENING DAYS getting a new season?
- According to Courcast's latest analysis, FASTENING DAYS has a 46% 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 FASTENING DAYS be renewed?
- FASTENING DAYS currently scores 46 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 FASTENING DAYS's renewal probability?
- FASTENING DAYS's CourScore is 46 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 | 61 | Sep 6, 2026, 12:00 AM |
| anilist | favorites | GLOBAL | 7 | Sep 6, 2026, 12:00 AM |
| anilist | popularity | GLOBAL | 2,480 | Sep 6, 2026, 12:00 AM |
| anilist | trending | GLOBAL | 0 | Sep 6, 2026, 12:00 AM |
| ann | rating | GLOBAL | 6.6 | Aug 29, 2026, 12:00 AM |
| crunchyroll | episode count | GLOBAL | 12 | Sep 6, 2026, 12:00 AM |
| crunchyroll | episode dislikes | GLOBAL | 1,816 | Sep 6, 2026, 12:00 AM |
| crunchyroll | episode likes | GLOBAL | 10,083 | Sep 6, 2026, 12:00 AM |
| crunchyroll | series available | GLOBAL | 1 | Sep 6, 2026, 12:00 AM |
| filmarks | mark count | JP | 2,016 | Sep 6, 2026, 12:00 AM |
| filmarks | score mean | JP | 76 | Sep 6, 2026, 12:00 AM |
| google trends | interest daily | GLOBAL | 8 | Sep 5, 2026, 12:00 AM |
| google trends | interest weekly | GLOBAL | 25 | Aug 30, 2026, 12:00 AM |
| kitsu | member count | GLOBAL | 85 | Sep 6, 2026, 12:00 AM |
| kitsu | rating rank | GLOBAL | 6,388 | Sep 6, 2026, 12:00 AM |
| kitsu | score mean | GLOBAL | 68.86 | Sep 6, 2026, 12:00 AM |
| mal | chapters total | GLOBAL | 376 | Sep 3, 2026, 12:00 AM |
| mal | completed | GLOBAL | 2,061 | Sep 6, 2026, 12:00 AM |
| mal | members | GLOBAL | 6,620 | Sep 6, 2026, 12:00 AM |
| mal | plan to watch | GLOBAL | 1,857 | Sep 6, 2026, 12:00 AM |
| mal | rating | GLOBAL | 7.67 | Sep 3, 2026, 12:00 AM |
| mal | source members | GLOBAL | 11,087 | Sep 3, 2026, 12:00 AM |
| mal | source status code | GLOBAL | 3 | Sep 3, 2026, 12:00 AM |
| mal | volumes total | GLOBAL | 42 | Sep 3, 2026, 12:00 AM |
| mal | watching | GLOBAL | 1,380 | Sep 6, 2026, 12:00 AM |
| mangaupdates | bayesian rating | GLOBAL | 7.63 | Sep 10, 2026, 12:00 AM |
| niconico | episode comments | JP | 108 | Sep 6, 2026, 12:00 AM |
| niconico | episode mylists | JP | 46 | Sep 6, 2026, 12:00 AM |
| niconico | episode views | JP | 3,370 | Sep 6, 2026, 12:00 AM |
| comments 7d | GLOBAL | 2,555 | Sep 6, 2026, 12:00 AM | |
| mentions 1d | GLOBAL | 7 | Sep 6, 2026, 12:00 AM | |
| mentions 7d | GLOBAL | 30 | Sep 6, 2026, 12:00 AM | |
| score 7d | GLOBAL | 2,263 | Sep 6, 2026, 12:00 AM | |
| thread count | GLOBAL | 30 | Sep 6, 2026, 12:00 AM | |
| threads 7d | GLOBAL | 30 | Sep 6, 2026, 12:00 AM | |
| shikimori | completion ratio | GLOBAL | 0.47 | Jul 21, 2026, 12:00 AM |
| shikimori | member count | GLOBAL | 669 | Jul 21, 2026, 12:00 AM |
| shikimori | score mean | GLOBAL | 63.7 | Jul 21, 2026, 12:00 AM |
| simkl | score mean | GLOBAL | 62 | Sep 6, 2026, 12:00 AM |
| wikipedia | pageviews daily | EN.WIKIPEDIA | 9 | Jun 8, 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 | 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 |