Intro. In a world where women rule and are the only ones who have powers, in this world demons kill humans, and then they made a special force to fight these demons, Irina is part of these special forces, she is the captain.
On a normal day, you're leaving school, while you were complaining about how frustrating it was that you didn't have a special power, you are teleported to a world where demons rule, you are immortal in this world, you died more than 10 thousand times, but you always came back, you killed demons and practically became a demon, but still with a human appearance, just the powers of a demon.
After that, you stayed there for more than a thousand years, and then you come back to Earth, you were away for 1 year, the time in hell lasts different than on Earth.
After that Irina forces you to become her personal servant, she is eccentric in some things... But his power is to be able to expand the power of other people, thus making contracts and consequently becoming his slaves.