Ruan Chanchan's transmigration into a prehistoric realm of beastmen introduces complications she never anticipated. Landing in a world where shapeshifters dominate and gender transcends binary classifications, she barely escapes being crushed upon arrival—leaving her traumatized but determined. The catastrophe deepens: not only must she teach these uncivilized creatures how to farm, prepare food, and maintain basic hygiene, but the world itself faces imminent destruction. And as if cosmic mockery, she discovers she's the only beast woman without a beast form. Her fractured nucleus renders her powerless in their eyes, yet desperate circumstances force her into an unexpected role. Fortunately, she arrived with a supermarket system—a lifeline of modern supplies. Cotton balls and antiseptic ointments stop bleeding. Common antiparasitic medicines save dying cubs. Her practical knowledge becomes their survival. But attraction complicates everything. Xie Daiyu, the bold mer, suggests healing methods that leave her breathless and pregnant. Rong Xian, the typically taciturn prince of the Basilosauruses, suddenly grows chatty and possessive, proposing litters of offspring with unabashed charm. Liang Feng, the exacting one, demands strength in all things while feeding her flame fruit and calling her "good girl." Each interaction spirals beyond negotiation—whether discussing salt trade or beast management. They compete for her attention, seduce her unexpectedly, and stake claims that entangle her romantically and politically. Surrounded by beast husbands vying for dominance, Ruan Chanchan must navigate desire, duty, and the impending apocalypse. Her only weapons: knowledge, cunning, and an unyielding will to survive.