Twin Swap: The Poison Master Protects Her Sister's Kids

Underground poison master Viper takes her dying twin sister’s place and returns to the powerful estate. Everyone thinks she is still the frail lady of the house—until she slaps the whole room down in a single day: seizing power, throwing out the parasites, protecting the children, and crushing the estate under her heel. She didn’t come to follow the rules.

She came to rewrite them. But the truth behind her sister’s poisoning is still buried deep in the estate...