Ganta Nakami
main character
TV
8.0
My TrackerPLANNING
Episode: 0 / 13
My Score:
Anime DetailsFINISHED
- Format
- TV series
- Episodes
- 13
- Episode length
- 24 min
- Total watch time
- 5 h 12 min
- Status
- Finished
- Aired
- April 11, 2023 – July 4, 2023
- Season
- Spring 2023
- Source
- Manga
- Studio
- LIDENFILMS
- Original creator
- Makoto Ojiro
- Age rating
- PG — 13 teens or older
- Country
- Japan
- AniList score
- 80/100
Estimated watch time
5h 12m
⚡ 3 days at 5 eps/day
Tags & Tropes
Coming of Age92%Iyashikei89%Primarily Teen Cast86%Heterosexual85%Photography85%Seinen84%School Club83%Astronomy82%Female Protagonist80%Male Protagonist80%
TVFINISHED2023 SPRING8.0 / 10 AniList score
Insomniacs After School
君は放課後インソムニア• Kimi wa Houkago Insomnia
Synopsis
Ganta Nakami is a high school student who suffers from insomnia. One day, he meets Isaki Magari, a girl with the same condition. A strange, but special relationship forms as they share a secret and catch up on their sleep in their school’s abandoned observatory… (Source: HIDIVE)
Trailer
Watch on YouTubeMain cast & voice actors
Should you watch Insomniacs After School?
Yes, if you enjoy romance and slice of life, especially stories with coming of age, iyashikei, primarily teen cast.
Fans rate it highly: 80/100 on AniList, with 73% of 28.1K ratings at 8/10 or higher. It's the #26 highest-rated anime of 2023.
About 5.9% of viewers drop it, which is typical.
At about 5 h 12 min in total, it is a short commitment — a weekend binge.
Where to Watch Officially
Availability, audio and subtitles vary by region and service.
Episodes
13 episodes are listed.
Creators & key staff
- Original creator
- Makoto Ojiro
- Series composition
- Rintarou Ikeda
- Character design
- Yuuki Fukuda
Related entries
Opening & ending themes
Openings (1)
- OP1“Itsu Aetara” by aiko · eps 1-13
Theme data from AnimeThemes.moe.
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Insomniacs After School FAQ
How many episodes does Insomniacs After School have?
Insomniacs After School has 13 episodes of about 24 minutes each, roughly 5 h 12 min in total.
How long does it take to watch Insomniacs After School?
About 5 h 12 min back to back. At two episodes a day it takes 7 days; at one hour a day, about 6 days.
Is Insomniacs After School finished?
Yes. Insomniacs After School has finished airing — the final episode aired July 4, 2023.
Is there a season 2 of Insomniacs After School?
No sequel is listed for Insomniacs After School as of October 2026. You can continue the story in the original manga.
Is Insomniacs After School based on a manga?
Yes. Insomniacs After School adapts the manga by Makoto Ojiro.
Who animated Insomniacs After School?
Insomniacs After School was animated by LIDENFILMS.
Who sings the opening of Insomniacs After School?
The opening, "Itsu Aetara", is performed by aiko.
Where can I watch Insomniacs After School?
Insomniacs After School is listed on HIDIVE, YouTube, Amazon Prime Video, Hulu. Availability varies by region — check the streaming links on this page.