Insomniacs After School

It is recorded as the work of Makoto Ojiro. Publication is recorded by Big Comics. The recorded date of publication is 2019. It is associated with Japan. Recorded genres are drama anime and manga, romance anime and manga and slice of life anime and manga.

• Ja Kanji — 君は放課後インソムニア • Ja Romaji — Kimi wa Hōkago Insomunia • Genre — * Drama • Romance • Slice of life

• Type — manga • Author — Makoto Ojiro • Publisher — Shogakukan • Magazine — Weekly Big Comic Spirits • First — May 20, 2019 • Last — August 21, 2023 • Volumes — 14

• Type — tv series • Director — Yūki Ikeda • Producer — * Emi Kashimura • Kyouhei Nishikawa • Reiko Sasaki • Tomoki Ueda • Yuriko Tamada • Chiharu Nagai • Writer — Rintarō Ikeda • Music — Yuki Hayashi • Studio — Liden Films • Licensee — Sentai Filmworks • Network — TXN (TV Tokyo) • First — April 11, 2023 • Last — July 4, 2023 • Episodes — 13

• Title — Live-action film • Content — * Insomniacs After School (2023)

• Portal — yes Insomniacs After School 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.

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.

• Ganta Nakami • Adam Gibbs • 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: • 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 Isaki has Hypoplastic left heart syndrome. • Yui Shiromaru: • 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: • 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: • 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: • 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: • Honoka Kawasaki • Isaki's artistic friend who is in the art club. She has a younger brother in elementary school. • Usako Kurashiki: • 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: • 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: • 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 • 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 • 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 • Ganta and Isaki's underclassman, who is one year younger. She joins the Astronomy Club due to her love for science and astronomy.

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 collected its chapters in 14 tankōbon volumes, released from September 12, 2019, to October 12, 2023. 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.

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 "When Can We Meet?" by Aiko, while the ending theme song is "Lapse" 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.

The Japanese band Macaroni Empitsu released a music video for their single "Centrifuge", which featured art from the manga, on November 21, 2019.