There is a saying that has been passed down since ancient times: monsters and demons cast no shadows.
Chong Mingsen, a boy who has had no shadow since childhood, meets Langu Anjue one day while carrying out a request for the school's odd-jobs club. She has been assigned punishment by the school.
The girl struggles through a lonely battle.
"Are you human, or a monster?"
Beneath the pale moonlight, the girl holds a blood-dripping blade to the boy's throat.
"Isn't it obvious? If you have a human shape and wear human clothes, then you're human, aren't you? That's the biggest difference between humans and animals. No, between humans and monsters..."
