One day, my twin brother confessed to me. “I’ve liked you since a long time ago. I want you to break up with your boyfriend and choose me.” However, right after the unexpected confession, we were both caught up in an accident and our short lives came to an end… or that was how it was supposed to be. For some reason, we were reincarnated in different world as twins. The world we reincarnated in was a world with Magical Supremacy. People with magical power dominated people without magic. As twins, we were given the names of Ceres and Licht, and we grew up quickly. However, I- who was born without magical power, was about to be sent to an isolation facility where non-magical people were held. There was only one way around it. To make a s*ave contract with someone who possessed high magical power. At that time, Licht, my brother who was an elite magician, made a proposition to help me. “If you don’t want to be sent to the facility, form a s*ave contract with me.” Just like that, our relationship as twins, which had turned to master- servant relationship, was the beginning of this twisted story.