Two girls, one is the key and the other is the lock cylinder.
She came from another world and was revered as a saint, but she was just a canary singing in a cage.
She has an unpredictable identity and holds a thunderbolt in her hand, but she is actually a cursed daughter who has been burdened with endless sins.
Can she still embrace the world?
How can she bathe in the light?
Redemption or subversion?
How will fate roll forward?
Purpose: Divinity and demonic nature are the foundation of human nature