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Insomniacs After School (TV)

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Alternative title:
Kimi wa Hōkago Insomnia (Japanese)
君は放課後インソムニア (Japanese)
Plot Summary: Two sleepless teenagers find kinship as they escape to their school's astronomy observatory. Unable to sleep at night, Ganta Nakami is cranky in class and unpopular with his classmates. He discovers that the school observatory, once used by the now-defunct astronomy club, may be the perfect place for a nap—but he's not alone. Fellow insomniac Isaki Magari is willing to share the observatory with Nakami, and a friendship between the two begins as they bond over the most unlikely of things. (from manga)
User Ratings: 89 ratings have been given [details]
 Masterpiece: 8 votes (sub:6, raw:1, others:1
1 French subtitled
 Excellent: 29 votes (sub:28, others:1
1 Spanish subtitled
 Very good: 26 votes (sub:24, others:2
1 Polish subtitled
1 Spanish subtitled
 Good: 16 votes (sub:15, others:1
1 Russian subtitled
 Decent: 3 votes (sub:2, others:1
1 Spanish subtitled
 So-so: 5 votes (sub:5)
 Not really good: 1 vote (sub:1)
 Weak: 1 vote (sub:1)
 Bad: -
 Awful: -
 Worst ever: -
Seen in part or in whole by 265 users, rank: #3208 (of 9337)
Median rating: Very good
Arithmetic mean: 7.989 (Very good), std. dev.: 1.4022, rank: #661 (of 9440)
Weighted mean: 7.939 (Very good), rank: #646 (of 9440) (seen all: 8.13 / seen some: 7.00 / won't finish: 4.59)
Bayesian estimate: 7.877 (Very good), rank: #519 (of 7113)
Episode titles: We have 13
Vintage: 2023-04-10
Opening Theme:
"Itsu Aetara" (いつ逢えたら; When Do We Meet?) by aiko
Ending Theme:
"Lapse" by Homecomings
#2: "Hertz" (ヘルツ) by Homecomings (ep 7)
Insert song:
"Nantonaku Nantonaku" (なんとなくなんとなく; Somehow Somehow) by Ukegawa [Seiichirō Yamashita], Magari [Konomi Tamura], Kanikawa [Lynn], Anamizu [Natsumi Fujiwara], Nono [Sumire Morohoshi] (ep 11)
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Japanese staff
Japanese cast
Director: Yuki Ikeda
Series Composition: Rintarou Ikeda
Script: Rintarou Ikeda
Storyboard: Sōta Yokote (eps 10, 12)
Episode Director:
Rokou Ogiwara (eps 4, 9)
Sōta Yokote (ep 10)
Music: Yuki Hayashi
Original creator: Makoto Ojiro
Character Design: Yuki Fukuda
Art Director: Tatsurō Ōnishi
Sound Director: Satoshi Motoyama
Director of Photography: Megumi Himeno

2D Work: Michiko Nakamura
Action Animation Director: Tōru Shigeta (ep 6)
Art Setting: Akihiro Hirasawa
Clothing Design: Momoko Nagakawa
Color design: Emiko Onodera
Editing: Mai Hasegawa (EditZ)
Insert Song Arrangement: Yuki Hayashi ("Nantonaku Nantonaku" ep 11)
Insert Song Composition: Hiroshi Kamayatsu ("Nantonaku Nantonaku" ep 11)
Insert Song Lyrics: Hiroshi Kamayatsu ("Nantonaku Nantonaku" ep 11)
Insert Song Performance:
Konomi Tamura (as Isaki Magari; "Nantonaku Nantonaku" ep 11)
Lynn (as Motoko Kanikawa; "Nantonaku Nantonaku" ep 11)
Natsumi Fujiwara (as Kanami Anamizu; "Nantonaku Nantonaku" ep 11)
Seiichirō Yamashita (as Tao Ukegawa; "Nantonaku Nantonaku" ep 11)
Sumire Morohoshi (as Mina Nono; "Nantonaku Nantonaku" ep 11)
Key Animation:
Kaori Akatsu (Liden Films Tokyo Studio; ep 1)
Yūki Hino (Liden Films Tokyo Studio; ep 1)
Theme Song Arrangement:
Homecomings (ED; ED 2)
Masanori Shimada (OP)
Theme Song Composition:
Ayaka Tatamino (ED; ED 2)
Theme Song Lyrics:
Yuki Fukutomi (ED; ED 2)
Theme Song Performance:
Homecomings (ED; ED 2)
Gen Sato as Ganta Nakami
Konomi Tamura as Isaki Magari

Haruka Tomatsu as Yui Shiromaru
Lynn as Motoko Kanikawa
Mamiko Noto as Usako Kurashiki
Natsumi Fujiwara as Kanami Anamizu
Seiichirō Yamashita as Tao Ukegawa
Shō Karino as Rui Haida
Sora Amamiya as Haya Magari
Sumire Morohoshi as Mina Nono

Arisa Nakata as Female Student (eps 3, 5)
Atsushi Tamaru as Senpai (ep 8)
Aya Suzaki as
Ganta (child; eps 8, 10-11)
Newscaster (ep 9)
Bianca Ogura as
Female Student (ep 6)
Spectator (ep 10)
Woman (ep 7)
Chiwa Saito as Kanikawa's Mother (ep 6)
Daisuke Nakamura as Radio Sound (ep 1)
Emiri Suyama as Female Student (ep 1)
Go Imakiire as Man (ep 7)
Hana Hishikawa as
Female Student (ep 6)
Haida's Girlfriend (ep 7)
Haruna Terada as
Female Student (ep 3)
Older Girl (ep 9)
Teacher (ep 2)
Hayato Kashiwazaki as Man (ep 7)
Hidenobu Kiuchi as Ganta's Father (eps 2, 5, 10)
Ikuto Kanemasa as Ken Hakui (eps 2, 4-6, 8)
Juri Nagatsuma as Female Student (ep 1)
Kōichi Sōma as Principal (ep 8)
Konomi Inagaki as
Child (ep 11)
Female Student (5 episodes
eps 1-2, 5-6, 12
Softball Club Member (ep 8)
Woman (ep 7)
Kumiko Nakane as Teacher (ep 10)
Mayuko Kazama as Female Student (ep 5)
Megumi Toyoguchi as Isaki's Mother (eps 9-10)
Mika Kanda as Home Ec Teacher (ep 4)
Minami Iinuma as Female Student (ep 1)
Mirie Saitō as Child (ep 11)
Mitsuki Nakae as Mother (ep 11)
Nao Ojika as Female Student (ep 1)
Riho Sugiyama as Female Student (ep 6)
Rin Kusumi as Female Student (ep 1)
Saeko Akiho as Vice Principal (eps 2, 5)
Sayaka Ohara as Ganta's Mother (eps 8, 12) 
Shinya Takahashi as Teacher (ep 5)
Shō Okumura as
Radio Sound (ep 1)
Teacher (ep 10)
Takako Tanaka as Female Student (ep 1)
Takuya Tsuda as
Male Student (6 episodes
eps 1, 4-6, 8, 12
Man (ep 7)
Tomomi Tanaka as Spectator (ep 10)
Tomoya Itō as Man (ep 7)
Tomoyo Takayanagi as Female Student (ep 1)
Yōhei Matsuoka as
Male Student (eps 5-6)
Student Council President (ep 9)
Yoko Soumi as Softball Club Advisor (ep 6)
Yu Kawada as
Announcement (ep 3)
Male Student (ep 5)
Police (ep 1)
Yūki Itō as Male Student (ep 6)
Yuri Hinami as
Female Student (ep 12) 
Woman (ep 7)
Yuuki Terui as Male Student (ep 6)
Japanese companies
2nd Key Animation:
A-Real (ep 7)
AXsiZ (ep 2)
diomedéa (ep 1)
FAI International (eps 2, 7)
Geek Toys (ep 1)
GK Sales (eps 1-2)
Hadashi Pro (ep 2)
J.C. Staff (eps 1-2)
LIDEN FILMS Osaka Studio (eps 1-2)
LIDEN FILMS Tokyo Studio (ep 1)
Line Farm (ep 7)
Nakamura Production (eps 2, 6)
R.I.C (ep 7)
Reboot (eps 2, 7)
Rising Force (ep 7)
Rocket Vision (ep 2)
Seven Arcs (ep 2)
Studio Elle (ep 2)
Studio Gimlet (ep 2)
Wao World (ep 1)
Wish (eps 6-7)
Yostar Pictures (eps 1-2)
3D Graphics: LIDEN FILMS
Animation Direction Assistance:
LIDEN FILMS Osaka Studio (ep 6)
LIDEN FILMS Tokyo Studio (ep 6)
Animation Production: LIDEN FILMS
Background Art: Kusanagi
Background Art Assistance: FSE Company (ep 1)
Editing Studio: EditZ
Finish Animation:
LIDEN FILMS Tokyo Studio (ep 2)
RadPlus (ep 2)
Reboot (eps 1-6)
Seed (ep 1)
Studio Gram (ep 2)
Wish (ep 7)
In-Between Animation:
LIDEN FILMS Kyoto Studio (ep 2)
LIDEN FILMS Osaka Studio (ep 2)
LIDEN FILMS Tokyo Studio (eps 1-2)
RadPlus (ep 2)
Reboot (eps 2-6)
Studio Gram (ep 2)
Taiguan Animation (ep 7)
Wish (ep 7)
Key Animation:
4tune (ep 7)
LIDEN FILMS Tokyo Studio (ep 1)
Reboot (ep 7)
Management: Wish (ep 7)
Online Editing: qooop (Q-Tec Studio; eps 1-7)
Photography: Graphinica
Production Cooperation: 4tune (eps 4, 8)
special effects: Yumeta Company
English staff
English companies
Internet Streaming: HIDIVE
Licensed by: Sentai Filmworks
Production: Sentai Studios
English cast
Italian staff
Italian companies
Distributor: Yamato Video
Internet Streaming: Amazon Prime Video (Anime Generation)
Italian cast
German staff
German companies
Distributor: KSM
Internet Streaming: Amazon Prime Video (via aniverse)
German cast

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