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
Jul 28, 2026, 04:16 AM
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: High • Updated 9 hours ago
Top reasons
- Cross-platform audience rating - Weighted audience rating 69.0
- Crunchyroll Like Index - 9,790 likes / 11,591 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 analysedJul 28, 2026, 04:16 AM
Next scheduledin 15 hours
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 | favorites | GLOBAL | 8 | Jul 21, 2026, 12:00 AM |
| threads 7d | GLOBAL | 48 | Jul 21, 2026, 12:00 AM | |
| mentions 1d | GLOBAL | 9 | Jul 21, 2026, 12:00 AM | |
| google trends | interest daily | GLOBAL | 0 | Jul 21, 2026, 12:00 AM |
| mentions 7d | GLOBAL | 48 | Jul 21, 2026, 12:00 AM | |
| thread count | GLOBAL | 48 | Jul 21, 2026, 12:00 AM | |
| google trends | interest weekly | GLOBAL | 19 | Jul 12, 2026, 12:00 AM |
| score 7d | GLOBAL | 5,963 | Jul 21, 2026, 12:00 AM | |
| anilist | average score | GLOBAL | 61 | Jul 21, 2026, 12:00 AM |
| comments 7d | GLOBAL | 5,369 | Jul 21, 2026, 12:00 AM | |
| anilist | trending | GLOBAL | 0 | Jul 21, 2026, 12:00 AM |
| wikipedia | pageviews daily | EN.WIKIPEDIA | 9 | Jun 8, 2026, 12:00 AM |
| youtube | uploads 30d | GLOBAL | 25 | Jun 17, 2026, 12:00 AM |
| youtube | subscribers total | GLOBAL | 1,290 | Jun 17, 2026, 12:00 AM |
| youtube | uploads 7d | GLOBAL | 25 | Jun 17, 2026, 12:00 AM |
| youtube | views 7d | GLOBAL | 13,579 | Jun 17, 2026, 12:00 AM |
| youtube | channel views total | GLOBAL | 260,870 | Jun 17, 2026, 12:00 AM |
| youtube | views 30d | GLOBAL | 13,579 | Jun 17, 2026, 12:00 AM |
| mangaupdates | bayesian rating | GLOBAL | 7.63 | Jul 22, 2026, 12:00 AM |
| ann | rating | GLOBAL | 6.6 | Jul 18, 2026, 12:00 AM |
| anilist | popularity | GLOBAL | 2,457 | Jul 21, 2026, 12:00 AM |
| shikimori | completion ratio | GLOBAL | 0.47 | Jul 21, 2026, 12:00 AM |
| kitsu | score mean | GLOBAL | 68.86 | Jul 21, 2026, 12:00 AM |
| shikimori | member count | GLOBAL | 669 | Jul 21, 2026, 12:00 AM |
| kitsu | member count | GLOBAL | 85 | Jul 21, 2026, 12:00 AM |
| mal | plan to watch | GLOBAL | 1,856 | Jul 21, 2026, 12:00 AM |
| shikimori | score mean | GLOBAL | 63.7 | Jul 21, 2026, 12:00 AM |
| mal | members | GLOBAL | 6,611 | Jul 21, 2026, 12:00 AM |
| mal | watching | GLOBAL | 1,382 | Jul 21, 2026, 12:00 AM |
| kitsu | rating rank | GLOBAL | 6,360 | Jul 21, 2026, 12:00 AM |
| mal | completed | GLOBAL | 2,050 | Jul 21, 2026, 12:00 AM |
| filmarks | mark count | JP | 1,991 | Jul 26, 2026, 12:00 AM |
| filmarks | score mean | JP | 76 | Jul 26, 2026, 12:00 AM |
| crunchyroll | episode count | GLOBAL | 12 | Jul 26, 2026, 12:00 AM |
| crunchyroll | episode likes | GLOBAL | 9,790 | Jul 26, 2026, 12:00 AM |
| niconico | episode comments | JP | 108 | Jul 26, 2026, 12:00 AM |
| crunchyroll | episode dislikes | GLOBAL | 1,801 | Jul 26, 2026, 12:00 AM |
| niconico | episode mylists | JP | 46 | Jul 26, 2026, 12:00 AM |
| crunchyroll | series available | GLOBAL | 1 | Jul 26, 2026, 12:00 AM |
| niconico | episode views | JP | 3,367 | Jul 26, 2026, 12:00 AM |