As graduation approaches, senior student Lin Yu is fretting over rent and finding a job when he unexpectedly picks up an old phone and gets bound to a Succubus System. The System gives him the ability to bewitch women, and each successful attempt earns him a reward. But it also comes with hidden dangers, such as timed bewitchment missions: fail to complete one, and he loses years of his life.
As Lin Yu uses the System to get out of his rent crisis, one thing after another goes wrong. He is not only stalked by someone mysterious, but also discovers his photograph in an old newspaper, hinting at a huge secret. As he races to complete the System’s missions, he must navigate relationships with all kinds of women while unraveling the mysteries behind the Succubus System and exploring the countless ties between himself and a mysterious castle. As the story unfolds, more enigmas surrounding the System and the forces behind it begin to surface. Can Lin Yu take control of his own fate amid this complex and dangerous situation? That is the story’s greatest suspense.