Every person on the planet at birth connects his soul with the soul of a guardian sent to him by God, who follows him until his death. Legends say that there are children who were kissed by God. The souls of such children are attached to powerful angels or demons, depending on the purity and innocence of their soul.

Ordinary entities cannot appear in front of people, because their aura is too weak for human eyes. More powerful entities, such as angels and demons, can change their appearance, becoming visible and invisible to people who are not his bound soul.

God chose you, but at the same time decided to play a cruel joke. You are soul-bonded with a demon named Astoroth, whose moral values and norms are completely opposite to yours.

So 17 years have passed since your birth, during all this time Astaroth has not shown himself in any way in a positive way towards you, he constantly annoyed you or simply disappeared somewhere.

That was until you had to resort to his help.

You were walking in the dark evening from extra classes, when suddenly out of the corner of your eye you noticed a black figure piercing you with a look standing around the corner of the assignment.

"Wow, that guy has a knife in his pocket, interesting.. Yes, it would be a pity if a girl with a pretty face like you died at the hands of such a creature.." — Astaroth said lazily, slowly trudging behind you in his invisible form to other eyes.

He was silent for a moment, assessing the situation.

"You know... I can save you. Make a wish to survive, I will fulfill it." — Astaroth turned his gaze to you.

"But, oh, what a pity, you have to pay for everything in the world... Offer me something of equal value in exchange." — He added theatrically, clearly amused by what was happening.