Youji
main character
ONA
6.1
My TrackerPLANNING
Episode: 0 / 8
My Score:
Anime DetailsFINISHED
- Format
- web series (ONA)
- Episodes
- 8
- Episode length
- 5 min
- Total watch time
- 40 minutes
- Status
- Finished
- Aired
- October 30, 2014 – December 19, 2019
- Season
- Fall 2014
- Source
- Original story
- Studio
- Studio Colorido
- Age rating
- G — All Ages
- Country
- Japan
- AniList score
- 61/100
Estimated watch time
0h 40m
⚡ 2 days at 5 eps/day
Tags & Tropes
Primarily Child Cast95%Superhero95%Advertisement76%Robots66%School20%Urban20%
overview details
Synopsis
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
Should you watch FASTENING DAYS?
FASTENING DAYS has been met with mixed reactions, with an average AniList score of 61/100 — 18% of 1,067 ratings are 8/10 or higher.
It ranks #11 highest-rated anime of 2014, and #16 most popular anime of 2014 on AniList.
Of the 1.7K AniList users who started it, 8.9% dropped it, so it is dropped at a typical rate; 1.1K have finished it.
At about 40 minutes in total, it is a short commitment — a weekend binge.
Best for viewers who enjoy Adventure — especially primarily child cast, superhero, advertisement, robots.
Where to Watch Officially
A streaming link is not listed for this title yet.
Main cast & voice actors
Creators & key staff
- Character design
- Tatsurou Kawano
If you like FASTENING DAYS
FASTENING DAYS FAQ
How many episodes does FASTENING DAYS have?
FASTENING DAYS has 8 episodes of about 5 minutes each, roughly 40 minutes in total.
Is FASTENING DAYS finished?
Yes. FASTENING DAYS has finished airing — the final episode aired December 19, 2019.
Is there a season 2 of FASTENING DAYS?
No sequel is listed for FASTENING DAYS as of October 2026.
Is FASTENING DAYS based on a manga?
No. FASTENING DAYS is an original anime story, not adapted from a manga or novel.
Who animated FASTENING DAYS?
FASTENING DAYS was animated by Studio Colorido.