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 Sato
• Konomi Tamura
• Haruka Tomatsu
• Seiichiro Yamashita
• Lynn
• Natsumi Fujiwara
• Sumire Morohoshi
• Mamiko Noto