Escaping the brutal deadly apocalypse, the heroine suddenly transmigrates to a savage primeval beast realm ruled by shape-shifting beastmen. A one-of-a-kind Animal Collection System binds to her, allowing her to gather every rare mythical creature—ferocious wolves, elegant merfolk, sly silver foxes, towering ancient sky dragons, and more. Five breathtakingly gorgeous, mighty beast lords from separate clans fall hopelessly in love with her, spoiling her without restraint and competing fiercely to be her mates. Now she dwells freely in this ancient wild land, surrounded by countless loyal magical beasts and five peerlessly handsome, doting beastman husbands.

Forbidden mistakes cost the noble lady everything; stripped of her title, she wanders the wilds in rags. Lost and helpless, she stumbles into a remote manor controlled by a cold, powerful duke. She believes only one lord resides within the estate. His mood shifts wildly without warning—one moment frigid and harsh, the next overflowing with obsessive, soft affection. Confused by his clashing habits and split temperament, the rebellious noble girl repeatedly defies his rules and tries to flee, yet she is always caught and locked back inside the luxurious manor. She never discovers the manor’s hidden secret: her jailer is not a single duke, but identical twin lords hiding behind one shared identity. One grows gentle toward her defiance, while the other burns with fury every time she attempts to escape. The twins swap roles, voices and appearances silently, spinning a web of lies and tangled desire around her. Trapped between two men with the exact same face, the lady sinks into chaos of hatred and reluctant love. Every rebellion only deepens their possessive fixation on her, and she soon realizes escaping their shared cage will demand a price she cannot afford to pay.