# Insomniacs After School

Insomniacs After School (Japanese: 君は放課後インソムニア, Hepburn: Kimi wa Hōkago Insomunia) is a Japanese manga series written and illustrated by Makoto Ojiro. It was serialized in Shogakukan's seinen manga magazine Weekly Big Comic Spirits from May 2019 to August 2023. An anime television series adaptation produced by Liden Films aired from April to July 2023. A live-action film adaptation premiered in June 2023.

## Plot

In the small city of Nanao, insomniac Ganta Nakami tries to catch a nap in his school's abandoned astronomical observatory. There he stumbles upon a sociable and carefree girl named Isaki Magari who has the same problem. The two form an awkward friendship and reestablish their school's defunct astronomy club.

## Characters
### Ganta Nakami (中見 丸太, Nakami Ganta)

    Voiced by: Gen Satō (Japanese); Adam Gibbs (English)
    Portrayed by: Daiken Okudaira
    A high school student of Kuyo High School who suffers from insomnia. He comes off as grumpy and unfriendly due to his condition. However, after meeting Isaki, he opens up to the people around him and reveals to Isaki that the cause of his insomnia is due to separation anxiety caused by his mother leaving him and his father. Ganta is determined to protect the observatory and the revived Astronomy Club, of which he is the president. He becomes Isaki's boyfriend at the end of the club trip during the summer holiday of their first year. He aims to get into a university with a nursing program in Kanazawa, Ishikawa, inspired by his desire to always be at Isaki's side.

### Isaki Magari (曲 伊咲, Magari Isaki)

    Voiced by: Konomi Tamura (Japanese); Jad Saxton (English)
    Portrayed by: Nana Mori
    A cheerful high school girl who also suffers from insomnia like Ganta. She first discovered the abandoned observatory and made it her sleeping haven, until Ganta came along. As she and Ganta became closer, she shared to him that she is suffering a defective heart condition since birth which requires monthly examinations, frequent hospitalization, and even surgeries. She was the only other member of the Astronomy Club in her first year, and became the vice-president later in the winter of the same year. She started dating Ganta after his confession at the end of their club trip. Initially, she aimed for a university within Ishikawa Prefecture, until she managed to convince her mother to allow her to try for a university in Osaka. Although never mentioned in the manga, it is confirmed by the author, that Magari has Hypoplastic left heart syndrome.

### Yui Shiromaru (白丸 結, Shiromaru Yui)

    Voiced by: Haruka Tomatsu (Japanese); Elissa Cuellar (English)
    Portrayed by: Minori Hagiwara
    An alumna of the Astronomy Club who runs an arcade near Wakuraonsen Station. She taught Ganta the basics of astrophotography and often acts as the unofficial advisor of the club. She had a crush on a classmate but did not confess to him. Yui lives in a container house next to the arcade and owns a cat named Rollo.

### Tao Ukegawa (受川 太鳳, Ukegawa Tao)

    Voiced by: Seiichiro Yamashita (Japanese); Blake Weir (English)
    Portrayed by: Kaisei Kamimura
    Ganta's childhood friend and a member of the Student Council. He is composed and usually gives good advice to Ganta whenever the latter feels down.

### Motoko Kanikawa (蟹川 モトコ, Kanikawa Motoko)

    Voiced by: Lynn (Japanese); Brittney Karbowski (English)
    Portrayed by: Rico Nagase
    Isaki's friend and the daughter of the owners of an okonomiyaki restaurant. Nicknamed "Motoko Princess" and "Kani", she is perceived as selfish and attention-seeking but is also caring of her family and friends. Motoko has a rivalry with Ganta.

### Kanami Anamizu (穴水 かなみ, Anamizu Kanami)

    Voiced by: Natsumi Fujiwara (Japanese); Olivia Swasey (English)
    Portrayed by: Seira Anzai
    Isaki's athletic friend who is in the softball club. She has a crush on Hira-senpai of the baseball club. Kanami is often depicted as a strong tomboy but also has a cute side to her: hates ghost stories, likes sweets and love talk.

### Mina Nono (野々 三奈, Nono Mina)

    Voiced by: Sumire Morohoshi (Japanese); Hilary Haag (English)
    Portrayed by: Honoka Kawasaki
    Isaki's artistic friend who is in the art club. She has a younger brother in elementary school.

### Usako Kurashiki (倉敷 兎子, Kurashiki Usako)

    Voiced by: Mamiko Noto (Japanese); Patricia Duran (English)
    Portrayed by: Yuki Sakurai
    An alcohol- and cigarette-loving school nurse who is also the Astronomy Club's advisor, despite her zero knowledge of the stars. However, she provides many valuable life lessons to the students and can be responsible when the time comes.

### Rui Haida (灰田 塁, Haida Rui)

    Voiced by: Shō Karino (Japanese); Brandon Hearnsberger (English)
    A blonde high schooler who likes partying and playing around. He quit the baseball club shortly after matriculation. He has had relationships before but seriously falls in love with Kanami. During the group's trip to Osaka, he confessed to Kanami but was rejected.

### Haya Magari (曲 早矢, Magari Haya)

    Voiced by: Sora Amamiya (Japanese); Natalie Rial (English)
    Portrayed by: Haruka Kudō
    Isaki's sister, who is four years older. She is a university student currently studying with her boyfriend in Kanazawa. After a sports festival during their elementary years, Haya told herself she should not feel sorry for her sister. Despite their everyday quarrels, she is shown to be caring for Isaki and trusts Ganta to take good care of her sister completely.

### Kai Shiromaru (白丸 甲斐, Shiromaru Kai)

    Yui's cousin, who is one year younger than Ganta and Isaki. He joins the Astronomy Club and becomes the next president when Ganta retired from club activities.

### Akane Furukimi (古君 茜, Furukimi Akane)

    Ganta and Isaki's underclassman, who is one year younger. She joins the Astronomy Club along with her friend Suzu because she likes photography.

### Suzu Chiura (千浦すず, Chiura Suzu)

    Ganta and Isaki's underclassman, who is one year younger. She joins the Astronomy Club due to her love for science and astronomy.

## Media
### Manga

Written and illustrated by Makoto Ojiro, Insomniacs After School was serialized in Shogakukan's seinen manga magazine Weekly Big Comic Spirits from May 20, 2019, to August 21, 2023. Shogakukan has collected its chapters into individual tankōbon volumes. The first volume was released on September 12, 2019. As of October 12, 2023, fourteen volumes have been released.
In June 2022, Viz Media announced that they licensed the series for English publication. On May 9, 2023, Viz Media launched their Viz Manga digital manga service, with the series' chapters receiving simultaneous English publication in North America as they are released in Japan.

#### Volumes

| No. | Original release date | Original ISBN | English release date | English ISBN |
| 1 | September 12, 2019 | 978-4-09-860395-4 | March 21, 2023 | 978-1-9747-3657-7 |
| 2 | December 12, 2019 | 978-4-09-860457-9 | June 20, 2023 | 978-1-9747-3703-1 |
| 3 | April 10, 2020 | 978-4-09-860573-6 | September 19, 2023 | 978-1-9747-4042-0 |
| 4 | August 7, 2020 | 978-4-09-860692-4 | December 19, 2023 | 978-1-9747-4104-5 |
| 5 | December 11, 2020 | 978-4-09-860781-5 | March 19, 2024 | 978-1-9747-4321-6 |
| 6 | April 12, 2021 | 978-4-09-860879-9 | June 18, 2024 | 978-1-9747-4580-7 |
| 7 | October 29, 2021 | 978-4-09-861142-3 | September 17, 2024 | 978-1-9747-4879-2 |
| 8 | January 12, 2022 | 978-4-09-861215-4 | December 17, 2024 | 978-1-9747-4947-8 |
| 9 | June 10, 2022 | 978-4-09-861314-4 | March 18, 2025 | 978-1-9747-5213-3 |
| 10 | September 12, 2022 | 978-4-09-861428-8 | June 17, 2025 | 978-1-9747-5572-1 |
| 11 | January 12, 2023 | 978-4-09-861499-8 | — | — |
| 12 | April 6, 2023 | 978-4-09-861613-8 | — | — |
| 13 | June 12, 2023 | 978-4-09-861721-0 | — | — |
| 14 | October 12, 2023 | 978-4-09-862536-9 | — | — |

### Anime

In January 2022, an anime television series adaptation was announced. The series is produced by Liden Films and directed by Yūki Ikeda, with scripts written by Rintarō Ikeda, character designs handled by Yuki Fukuda, and music composed by Yuki Hayashi. It aired from April 11 to July 4, 2023, on TV Tokyo and other channels. The opening theme song is "Itsu Aetara" (いつ逢えたら, "When Can We Meet") by Aiko, while the ending theme song is "Lapse" (ラプス) by Homecomings.
Sentai Filmworks licensed the series and is streaming it on Hidive. An English dub was later released starting in November 2024. Muse Communication has licensed the series in Southeast Asia.

#### Episodes

| No. | Title | Directed by | Written by | Storyboarded by | Original release date |
| 1 | "Capella" Transliteration: "Notoboshi -Giyoshiyaza Kapera-" (Japanese: 能（の）登（と）星（ぼし） ぎよしや座力ぺラ) | Yūki Ikeda | Rintarō Ikeda | Yūki Ikeda | April 11, 2023 (2023-4-11) |
| 2 | "Upsilon and Lambda Scorpii" Transliteration: "Neko no Meboshi -Sasoriza no Nibanboshi-" (Japanese: 猫（ねこ）の⽬（め）星（ぼし） さそり座の二番星) | Taisuke Mamoru | Rintarō Ikeda | Tomoko Akiyama | April 18, 2023 (2023-4-18) |
| 3 | "Fomalhaut" Transliteration: "Hitotsu Boshisan -Fuōmaruhauto-" (Japanese: ⼀（ひと）つ星（ぼし）さん フオーマル（うわ座）ハウト) | Ikuhiro Matsui | Rintarō Ikeda | Yūki Ikeda | April 25, 2023 (2023-4-25) |
| 4 | "Venus" Transliteration: "Amatsumikaboshi -Kanaboshi-" (Japanese: 天（あま）津（つ）甕（みか）星（ぼし） 金星) | Rokō Ogiwara | Rintarō Ikeda | Kenji Setō | May 2, 2023 (2023-5-2) |
| 5 | "Canopus" Transliteration: "Tobiagariboshi -Riyūkotsuhoshi Kanōpusu-" (Japanese: ⾶（と）び上（あ）がり星（ぼし） りゅうこつ星 力ノープス) | Yasuyuki Shinozaki | Rintarō Ikeda | Michio Fukuda, Kenji Setō, Yūichi Itō | May 9, 2023 (2023-5-9) |
| 6 | "Shooting Star" Transliteration: "Hashiriboshi -Ryūsei-" (Japanese: 走（はし）り星（ぼし） 流星) | Taisuke Mamoru | Rintarō Ikeda | Taisuke Mamoru | May 16, 2023 (2023-5-16) |
| 7 | "The Fireworks Star" Transliteration: "Hanabiboshi -Pureadesu Hoshi-" (Japanese: 花（な）⽕（び）星（ぼし） プレアデス星团) | Kazuya Fujishiro | Rintarō Ikeda | Tomoko Akiyama | May 23, 2023 (2023-5-23) |
| 8 | "The Congregation Star" Transliteration: "Atsumariboshi -Pureadesu Hoshi-" (Japanese: 集（あつ）まり星（ぼし） プレアデス星团) | Daiki Handa | Rintarō Ikeda | Satoshi Shimizu | May 30, 2023 (2023-5-30) |
| 9 | "Altair and Vega" Transliteration: "Hoshiai -Arutairu・Bega-" (Japanese: 星（ほし）合（あい） アルタイル・ベガ) | Rokō Ogiwara | Rintarō Ikeda | Yūichi Itō | June 6, 2023 (2023-6-6) |
| 10 | "Spica of Virgo" Transliteration: "Anehanboshi -Otomeza Supica-" (Japanese: 姉（あね）はん星（ぼし） 乙女座スピ力) | Sōta Yokote | Rintarō Ikeda | Sōta Yokote | June 13, 2023 (2023-6-13) |
| 11 | "The First Stars of Dawn" Transliteration: "Yoake no Ichibanboshi -Pureadesu Hoshi-" (Japanese: 夜（よ）明（あ）けの一（いち）番（ばん）星（ぼし） プレアデス星团) | Kazunari Araki | Rintarō Ikeda | Tomoko Akiyama | June 20, 2023 (2023-6-20) |
| 12 | "Planet" Transliteration: "Mayoiboshi -Wakusei-" (Japanese: 迷（まよ）い星（ぼし） 惑星) | Satoshi Toba | Rintarō Ikeda | Sōta Yokote, Yūki Ikeda | June 27, 2023 (2023-6-27) |
| 13 | "Methuselah" Transliteration: "Saikoboshi -Metotsuera-" (Japanese: 最（さい）古（こ）の星（ぼし） メトツエラ) | Yūki Ikeda, Kayonaka Yamada | Rintarō Ikeda | Shinobu Yoshioka | July 4, 2023 (2023-7-4) |

### Film

In January 2022, a live-action film adaptation was announced. The film is directed by Chihiro Ikeda, produced by United Productions, and distributed by Pony Canyon. The film premiered on June 23, 2023. The film was later selected by Fantasia Film Festival, to be presented at the 2023 edition.

### Other media

The Japanese band Macaroni Enpitsu [ja] released a music video for their single "Enshin" (遠心, "Centrifuge"), which featured art from the manga, on November 21, 2019.

## Reception

In 2020, Insomniacs After School was one of the 50 nominees for the 6th Next Manga Awards in the print category. Insomniacs After School also won the Mandō Kobayashi Manga Grand Prix 2023, created by comedian and manga enthusiast Kendo Kobayashi. The series was also listed in the top 10 in the 2024 edition of the Young Adult Library Services Association's Great Graphic Novels for Teens.