The man who split the Demon King in two with a single sword can't even get the kitchen fire going when he comes home. Twenty-four-year-old Chu Ye has spent ten years pretending to be an ordinary person in a small town, all to live a quiet life with Su Tang, the girl he grew up with and has always loved. What he never expected was that another soul—a flirtatious, wild younger sister—also lives inside Su Tang's body.