In the heart of Neo Mountain, behind impenetrable walls and cutting-edge security, sixteen-year-old Jisung has never known life beyond the compound. Raised alongside his brothers and a group of young men under the watchful eye of his father - Lee Taeyong - Jisung's world is one of strict rules. But as autumn descends on the mountain, so do the shadows. Strange howls echo through the night. Massive claw marks appear on trees. And a chance discovery in a hidden laboratory sets Jisung on a dangerous path to uncover the true nature of his family's legacy. When a group of mysterious outsiders breaches the compound's defenses, loyalties are tested, alliances shift, and the line between man and monster begins to blur. Jisung and his brothers must confront the darkness lurking in both the mountain and their hearts. **WILL CONTAIN SPANKING!!! DON'T LIKE DON'T READ!!!** TW: Violence, body horror, manipulation Chapters with spanking will be marked (**chapter**) NO TAEIL!