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 things. Magari and her friends pass the first winter of high school with cozy sleepovers at Nono"™s house. As spring arrives, Nakami turns 16, and the couple"™s second year of high school begins. But with a new grade comes new chaos, and the pair finds their relationship taking steps forward in ways they never expected!