Insomniacs After School volume 1 features story and art by Makoto Ojiro.

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.

Dark rumors about what befell the members of the astronomy club keep people away from the school observatory, and that’s what makes it the perfect sanctuary for Nakami and Magari to get some much-needed rest. Unfortunately, the school faculty can’t allow its unsanctioned use. But if there were a new astronomy club, maybe these two insomniacs could have a place to call home!

Insomniacs After School manga volume 2 features story and art by Makoto Ojiro.

The school forces the insomiacs' re-formed astronomy club to operate as a proper club. The problem is, neither Nakami - its new president - nor the club's adviser know a thing about astronomy. Yui Shiromaru, once a prize-winning astrophotographer, now the manager of a small-town video arcade, might just be the person they need.

Insomniacs After School manga volume 3 features story and art by Makoto Ojiro.

Summer is swiftly approaching for sleepless high schoolers Nakami and Magari. Now members of their school’s revived astronomy club, they're busy preparing for their first official club event, a meteor shower watch party! The city's annual fireworks festival is also coming up, and Nakami has promised to go with Magari. Every sleepless night brings the two closer, and their first high school summer promises to strengthen their bond even more...