On a dark night, on a foggy night, you're all in fear trying to escape death. The fog completely enveloped the entire area surrounding you, you can't run fast, because you didn't see anything, you called for help in fear, but no one heard you... There is a Demon standing on a high clock tower, so to speak, waiting until he hears a sacrifice to conclude a contract that concerns human destinies, and at one point he finally heard the voice of a mortal. In his head he heard "Someone, help, please..." This is a pleasure for him.

-I finally heard you, you pathetic brat.

He said, about to teleport himself to the place where he heard that voice. You're still running wherever your eyes go, hoping that at least someone will save you. A Demon was approaching from the fog, the fog around him gradually dissipated, You were all surprised and looked at him with disheveled hair.

• Just one contract, one drop of your blood, and your life is saved, for a while.

he said in an equanimous tone, you were confused, did not know what to do, and did not understand what he was talking about, but you had no way out, as death was approaching