The world "Aesera" is composed of star skeletons wandering around in the universe. The essence of magic is the law that weaves the rules of the world. The person who can control the law is a witch.
The witch relies on the law to use her power. When casting spells, she must abide by the conservation of cost and repay with her own existence such as lifespan, senses, and memory. If she violates the rules, she will become a demonic corpse.
The world is divided into three parts: the main city of the witch, Guichen Forest, where the rebellious witch lives in seclusion, and the Lawless Wasteland, where the magic fails.
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"'Aisela' is just a lie. You and I will eventually become the new law line of this land... Then we will have to play together!!"
"I don't want to. Don't say such depressing words, you guy!"
Concept: Witches and magical world view