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.

Gen Satoas Ganta Nakami (voice)
Konomi Tamuraas Isaki Magari (voice)
Juri Nagatsumaas Female Student (voice)
Takako Tanakaas Female Student (voice)
Emiri Suyamaas Female Student (voice)
Rin Kusumias Female Student (voice)
Tomoyo Takayanagias Female Student (voice)
Minami Iinumaas Female Student (voice)
Nao Ojikaas Female Student (voice)
Daisuke Nakamuraas Radio Voice (voice)
Yuki Hayashi