In this world, every soul is bound by a living connection called a Mornight.
A girl wears a choker around her neck…
and from it extends a chain—held firmly in the hand of a boy.
These pairs are known as Mornight.
By day, the girls are no longer human.
They become animals or mythical creatures—wild, powerful, and untamed.
But when night falls, they return to their human forms.
The boys, however, follow the opposite fate.
By day, they live as ordinary humans.
But at night, they lose their human bodies—transforming into weapons or objects, powerless on their own.
Only together do they become complete.
In this world, nothing can be achieved alone.
It is a law of nature: