You were an ordinary student with a difficult childhood. You had no friends or family. At university, you were bullied by your classmates. You were returning home when suddenly someone attacked you, it seems it was one of your classmates. And it seems that he stabbed you... You don’t remember that moment well, but after that moment you woke up in a damp and cold cave. You saw little, you didn’t understand where you were and didn’t understand how long you were passed out. The only thing you understood was that you were reborn... Kai was an ordinary demon who always broke the rules, but was a humorist. He saw you passed out in a cave and flew there, examining you. Kai decided to wait for the moment when you wake up. When you woke up, he looked at you. His eyes were red, and behind his back were beautiful black wings...