Cover of the first Japanese volume of Insomniacs After School

Manga

Insomniacs After School

君は放課後インソムニア

Story & art
Makoto Ojiro
First chapter
Status
Completed (125 chapters)
Volumes
14
Magazine
Weekly Big Comic Spirits
Publisher
Shogakukan
Genres
Romance, Slice of life, Drama

Other names: Kimi wa Hōkago Insomnia

Description

Insomniacs After School takes place in present-day Nanao, in Japan’s Ishikawa Prefecture. Ganta Nakami is a high school student whose insomnia leaves him irritable and misunderstood. When he looks for a place to nap, he finds classmate Isaki Magari in the school’s unused observatory. She can’t sleep at night either. The room becomes their shared refuge, and their friendship starts in private, away from classmates who don’t know what they’re struggling with.

To keep using the observatory, they revive the astronomy club. Stargazing and nighttime photography give their growing bond shared goals beyond romance. The story takes its time with quiet conversations and everyday gestures, while detailed nightscapes give the setting a strong presence. The tone is warm and often hopeful, with playful humor, but anxiety, health worries, and family pressures can make it emotionally heavy. There is little violence; the tension is mainly emotional.

Pros

  • Small gestures and natural dialogue make the romance feel believable.
  • Detailed nightscapes make the stargazing feel tangible.
  • Quiet scenes convey the exhaustion and isolation of sleepless nights.

Cons

  • Slow stretches of daily life may feel uneventful.
  • Later pacing can feel rushed, with some developments given little room.

Awards

Main characters

  • Ganta Nakami, a character from Insomniacs After School

    Ganta Nakami

    中見丸太

  • Isaki Magari, a character from Insomniacs After School

    Isaki Magari

    曲伊咲

  • Yui Shiromaru, a character from Insomniacs After School

    Yui Shiromaru

    白丸結

  • Tao Ukegawa, a character from Insomniacs After School

    Tao Ukegawa

    受川太鳳

  • Motoko Kanikawa, a character from Insomniacs After School

    Motoko Kanikawa

    蟹川モトコ

  • Kanami Anamizu, a character from Insomniacs After School

    Kanami Anamizu

    穴水かなみ

  • Mina Nono, a character from Insomniacs After School

    Mina Nono

    野々三奈

  • Usako Kurashiki, a character from Insomniacs After School

    Usako Kurashiki

    倉敷兎子

  • Rui Haida, a character from Insomniacs After School

    Rui Haida

    灰田塁

  • Haya Magari, a character from Insomniacs After School

    Haya Magari

    曲早矢

Examples of Manga Pages