Do you know Einstein's theory of parallel spaces? Would the self in another world stand in front of me and speak? Luo Mengtong, an ordinary high school girl, is in this situation now. Her self in another world asked if she wanted to exchange souls. My self in another dimension is a witch, a dark witch. It was a magical world, and everyone knew magic. Ever since, Luo Mengtong didn't want to do any more homework or be scolded by the teacher, so she agreed in a daze. However, the actual situation was beyond his imagination. Because she is a witch, a dark witch, there will be hunters chasing her; there are also many people who hang on to her magic power. In order to save his life, he had no choice but to sign a contract with a sinister handsome man that could not be violated for the rest of his life. At this time, an organization that rules the world, the Magic Association, wants to use the huge magic power stored in this space to rewrite this space - to eliminate all humans, they want to become the master! Of course Luo Mengtong would not agree, because this was another exchange condition for herself. So. Luo Mengtong had to evade pursuit, fight with the enemy, and quarrel with the handsome and sinister man. From now on, the Dark Night Magic Book is writing the next story...