Rumors say a ghost haunts the defunct Astronomy Club’s observatory, so most students give it a wide berth. However, what makes the clubroom terrifying also makes it the perfect naptime getaway for an insomniac Magari! But she isn’t alone in her sleepless struggle, and when her classmate and fellow insomniac Nakami finds Magari’s secret hideaway, she invites this kindred spirit to share her sanctuary. Alas, school administration can’t condone unsanctioned use of campus property, so if they want to save their hideout, they’ll need to band together and reawaken both the Astronomy Club and their hearts in INSOMNIACS AFTER SCHOOL!