TV series
Ganta Nakami is a high school student who suffers from insomnia. He meets Isaki Magari, a girl with the same condition. A relationship forms as they share a secret and catch up on their sleep in their school’s abandoned observatory.
Availability
Insomniacs After School premiered April 11, 2023. We don't have a confirmed streaming, rental or purchase option yet.
Ganta Nakami is a high school student who suffers from insomnia. He meets Isaki Magari, a girl with the same condition. A relationship forms as they share a secret and catch up on their sleep in their school’s abandoned observatory.
Choose an episode, then use the watch options above for the show.
Episode 1
When Ganta Nakami goes into the observatory, rumored to be haunted, he finds his classmate Isaki Magari sound asleep! They learn they're both struggling with the same problem.
Directed by Yuuki IkedaWritten by Rintaro IkedaGuest stars Takuya Tsuda, Juri Nagatsuma, Takako Tanaka, Emiri Suyama, Rin Kusumi, Tomoyo Takayanagi, Minami Iinuma, Nao Ojika
Episode 2
Ganta and Isaki have experienced lonely nights as they each struggle with sleeplessness. They form a "Nightly Fun Society" using the observatory as a secret base.
Directed by Taisuke MamoriWritten by Rintaro IkedaGuest stars Seiichiro Yamashita, Lynn, Natsumi Fujiwara, Sumire Morohoshi, Mamiko Noto, Sho Karino, Ikuto Kanemasa, Hidenobu Kiuchi
Episode 3
When another student expresses interest in joining the Astronomy Club, it makes things a lot more complicated for Ganta!
Directed by Fumihiro MatsuiWritten by Rintaro IkedaGuest stars Yuu Kawada, Haruna Terada, Arisa Nakada, Haruka Tomatsu, Seiichiro Yamashita, Mamiko Noto
Episode 4
Ganta invites Isaki to the fireworks festival, swearing that they'd only be going together for "photography practice," and Isaki promptly accepts.
Directed by Rokou OgiwaraWritten by Rintaro IkedaGuest stars Takuya Tsuda, Mika Kanda, Haruka Tomatsu, Seiichiro Yamashita, Lynn, Natsumi Fujiwara, Sumire Morohoshi, Sho Karino
Episode 5
On a cloudy seaside class trip, Isaki makes a promise with Ganta to meet on the beach under the starry sky if the weather clears up.
Directed by Yasuyuki ShinozakiWritten by Rintaro IkedaGuest stars Takuya Tsuda, Arisa Nakada, Shinya Takahashi, Yohei Matsuoka, Yuu Kawada, Mayuko Kazama, Lynn, Natsumi Fujiwara
Episode 6
The heat is unbearable! The lack of AC doesn’t help. Even the breeze is too warm. It's almost too hot to take pictures.
Directed by Taisuke MamoriWritten by Rintaro IkedaGuest stars Takuya Tsuda, Yohei Matsuoka, Yoko Soumi, Hana Hishikawa, Riho Sugiyama, Bianca Ogura, Yuki Ito, Yuki Terui
Episode 7
Isaki and Ganta try to hand out fliers at the Shokusai Market for a meteor shower viewing party. Will anyone take them up on their offer?
Directed by Kazuya FujishiroWritten by Rintaro IkedaGuest stars Yuri Hinami, Bianca Ogura, Takuya Tsuda, Go Imakiire, Hayato Kashiwazaki, Tomoya Ito, Seiichiro Yamashita, Lynn
Episode 8
It's almost time for summer break! If that weren't enough to be excited about, the Astronomy Club plans a meteor shower viewing party.
Directed by Daiki HandaWritten by Rintaro IkedaGuest stars Takuya Tsuda, Atsushi Tamaru, Kouichi Souma, Haruka Tomatsu, Seiichiro Yamashita, Lynn, Natsumi Fujiwara, Sumire Morohoshi
Episode 9
After the viewing party was rained out, Ganta plans to shoot pictures of the starry night sky and then use them to enter a contest.
Directed by Rokou OgiwaraWritten by Rintaro IkedaGuest stars Haruka Tomatsu, Seiichiro Yamashita, Lynn, Natsumi Fujiwara, Sumire Morohoshi, Sho Karino, Sora Amamiya, Megumi Toyoguchi
Episode 10
Despite starting a part-time job, Ganta hasn’t raised enough money for training camp. But thanks to Isaki staying at her grandmother's house, their problems are solved.
Directed by Sota YokoteWritten by Rintaro IkedaGuest stars Haruka Tomatsu, Mamiko Noto, Aya Suzaki, Sora Amamiya, Hidenobu Kiuchi, Megumi Toyoguchi, Kumiko Nakane, Shou Okumura
Episode 11
On the second day of their training camp, Ganta and Isaki's adventure begins with a trip to Mitsukejima.
Directed by Kazunari ArakiWritten by Rintaro IkedaGuest stars Aya Suzaki, Mitsuki Nakae, Konomi Inagaki, Mirii Saito
Episode 12
With their chaperone Haya now gone, Ganta and Isaki are left all alone at her grandmother's house.
Directed by Akira TobaWritten by Rintaro IkedaGuest stars Seiichiro Yamashita, Lynn, Natsumi Fujiwara, Sumire Morohoshi
Episode 13
Isaki's parents find out that she and Ganta have been staying all by themselves. Naturally, they demand that Isaki come home right away, but she refuses.
Directed by Yuuki Ikeda, Kayona YamadaWritten by Rintaro IkedaGuest stars Takuya Tsuda, Haruka Tomatsu, Seiichiro Yamashita, Lynn, Natsumi Fujiwara, Sumire Morohoshi, Mamiko Noto, Sho Karino
Episode information updated Sep 18, 2026
Available now in United States
These shows are available now and closely match Insomniacs After School.
Gen SatoGanta Nakami (voice)
Konomi TamuraIsaki Magari (voice)
Juri NagatsumaFemale Student (voice)
Takako TanakaFemale Student (voice)
Emiri SuyamaFemale Student (voice)
Rin KusumiFemale Student (voice)
Yuu KawadaAnnouncement (voice)
Arisa NakadaFemale Student (voice)
TV TokyoJapan
LIDENFILMSJapan
Pony CanyonJapan
ShogakukanJapan
