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
Oct 28, 2026, 06:25 AM
Franchise overview
Franchise timeline
Review every Courcast-tracked season for this series and jump between entries.
Renewal pulse
Courcast score breakdown
CourScore weighs signals for an official sequel announcement within 18 months, blending attention velocity, completion strength, and catalogue health.
CourScore
15.3
CourScore measures renewal signals out of 100. It is not a calibrated probability of an official sequel announcement within 18 months.
Signal coverage: 100% • Signal freshness: High • Updated 11 hours ago
Top reasons
- Reddit discussion momentum - 48 weekly Reddit threads, compared with current activity
- Committee renewal track record - Lead committee members (Studio Colorido) have a smoothed catalogue continuation rate of 17%, above the catalogue average of 14%
- Cohort rating percentile - 55th percentile within season cohort
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 & Commercial36
Production Feasibility24
Audience Reception42
Strategic Priors37
Fandom Engagement74
CourScore history
CourScore over time
Last analysedOct 28, 2026, 06:25 AM
Next scheduledin 13 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 15/100 renewal signal score. 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 15 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. Scores from 70 indicate strong renewal signals; scores from 85 are labelled very likely.
- What is FASTENING DAYS's renewal probability?
- FASTENING DAYS's CourScore is 15 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 signal score 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 | Oct 18, 2026, 12:00 AM |
| anilist | favorites | GLOBAL | 5 | Oct 18, 2026, 12:00 AM |
| anilist | popularity | GLOBAL | 2,496 | Oct 18, 2026, 12:00 AM |
| anilist | trending | GLOBAL | 0 | Oct 18, 2026, 12:00 AM |
| ann | rating | GLOBAL | 6.52 | Oct 25, 2026, 12:00 AM |
| crunchyroll | episode count | GLOBAL | 12 | Sep 13, 2026, 12:00 AM |
| crunchyroll | episode dislikes | GLOBAL | 1,825 | Sep 13, 2026, 12:00 AM |
| crunchyroll | episode likes | GLOBAL | 10,131 | Sep 13, 2026, 12:00 AM |
| crunchyroll | series available | GLOBAL | 1 | Sep 13, 2026, 12:00 AM |
| filmarks | mark count | JP | 2,041 | Oct 18, 2026, 12:00 AM |
| filmarks | score mean | JP | 76 | Oct 18, 2026, 12:00 AM |
| google trends | interest daily | GLOBAL | 0 | Sep 12, 2026, 12:00 AM |
| google trends | interest weekly | GLOBAL | 0 | Oct 11, 2026, 12:00 AM |
| google trends | momentum log ratio | GLOBAL | 0 | Oct 11, 2026, 12:00 AM |
| kitsu | member count | GLOBAL | 85 | Oct 18, 2026, 12:00 AM |
| kitsu | rating rank | GLOBAL | 6,421 | Oct 18, 2026, 12:00 AM |
| kitsu | score mean | GLOBAL | 68.86 | Oct 18, 2026, 12:00 AM |
| mal | chapters total | GLOBAL | 376 | Sep 3, 2026, 12:00 AM |
| mal | completed | GLOBAL | 2,075 | Oct 18, 2026, 12:00 AM |
| mal | members | GLOBAL | 6,628 | Oct 18, 2026, 12:00 AM |
| mal | plan to watch | GLOBAL | 1,858 | Oct 18, 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 | 1,379 | Oct 18, 2026, 12:00 AM |
| mangaupdates | bayesian rating | GLOBAL | 7.63 | Oct 26, 2026, 12:00 AM |
| niconico | episode comments | JP | 108 | Oct 18, 2026, 12:00 AM |
| niconico | episode mylists | JP | 46 | Oct 18, 2026, 12:00 AM |
| niconico | episode views | JP | 3,370 | Oct 18, 2026, 12:00 AM |
| comments 7d | GLOBAL | 3,090 | Oct 18, 2026, 12:00 AM | |
| mentions 1d | GLOBAL | 7 | Oct 18, 2026, 12:00 AM | |
| mentions 7d | GLOBAL | 48 | Oct 18, 2026, 12:00 AM | |
| score 7d | GLOBAL | 1,074 | Oct 18, 2026, 12:00 AM | |
| thread count | GLOBAL | 48 | Oct 18, 2026, 12:00 AM | |
| threads 7d | GLOBAL | 48 | Oct 18, 2026, 12:00 AM | |
| shikimori | completion ratio | GLOBAL | 0.47 | Oct 18, 2026, 12:00 AM |
| shikimori | member count | GLOBAL | 677 | Oct 18, 2026, 12:00 AM |
| shikimori | score mean | GLOBAL | 63.7 | Oct 18, 2026, 12:00 AM |
| simkl | score mean | GLOBAL | 62 | Oct 18, 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 |