Goo Yeonseo, the flawless marketing ace of AZ Company, hides a colossal secret: he is a legendary Gumiho—a nine-tailed fox who completed his transformation in a mere two centuries. Though destined to become a Celestial Fox, Yeonseo chose a mortal path, enduring every human ordeal from entrance exams to job hunts to forge a quiet human life. But his perfectly crafted façade crumbles in a single, fatal slip-up, exposing his true nature to the developer, Yoo Minhyuk! To his terror, his fox magic holds no sway over Minhyuk. Now, to salvage his peaceful existence, the Gumiho must scheme to win over both Minhyuk and his brother in this chaotic, close-quarters romance!