Yui Aoi
main character
OVA
5.9
My TrackerPLANNING
Episode: 0 / 12
My Score:
Anime DetailsFINISHED
- Format
- OVA
- Episodes
- 12
- Episode length
- 14 min
- Total watch time
- 2 h 48 min
- Status
- Finished
- Aired
- April 3, 2014 – December 1, 2015
- Season
- Spring 2014
- Source
- Manga
- Studio
- SynergySP
- Original creator
- Nao Maita
- Age rating
- PG — Children
- Country
- Japan
- AniList score
- 59/100
Estimated watch time
2h 48m
⚡ 3 days at 5 eps/day
Tags & Tropes
Shoujo79%School50%Heterosexual20%
overview details
Synopsis
The story begins with Hanabi, a sixth-grade girl who is neither an adult nor a child. She deals with issues such as accidentally witnessing her homeroom teacher kissing, and worrying about experiencing physiological changes before her friends. The manga depicts a 12-year-old girl's innocent worries and first love. (Source: Anime News Network)
Should you watch 12-sai.?
12-sai. has been poorly received, with an average AniList score of 59/100 — 20% of 1,413 ratings are 8/10 or higher.
Of the 2.6K AniList users who started it, 8.7% dropped it, so it is dropped at a typical rate; 2K have finished it.
At about 2 h 48 min in total, it is a short commitment — a weekend binge.
Best for viewers who enjoy Romance — especially shoujo.
Where to Watch Officially
A streaming link is not listed for this title yet.
Episodes
8 episodes are listed.
Main cast & voice actors
Creators & key staff
- Original creator
- Nao Maita
Related entries
If you like 12-sai.
12-sai. FAQ
How many episodes does 12-sai. have?
12-sai. has 12 episodes of about 14 minutes each, roughly 2 h 48 min in total.
How long does it take to watch 12-sai.?
About 2 h 48 min back to back. At two episodes a day it takes 6 days; at one hour a day, about 3 days.
Is 12-sai. finished?
Yes. 12-sai. has finished airing — the final episode aired December 1, 2015.
Is there a season 2 of 12-sai.?
No sequel is listed for 12-sai. as of October 2026. You can continue the story in the original manga.
Is 12-sai. based on a manga?
Yes. 12-sai. adapts the manga by Nao Maita.
Who animated 12-sai.?
12-sai. was animated by SynergySP.