The Poisoned Princess Trains the Deadliest Slave

Betrayed and executed by her own sister, Cecilia, the feared “Poison Princess,” is suddenly given a second chance at life. With the memories of her death still fresh, she swears revenge. Her first move is shocking, she buys the very knight who once killed her, now a broken slave named Daniel. “Help me take my revenge,” she commands, confronting the man who was once her executioner. Bound together by betrayal, poison, and a dark past, a dangerous and unpredictable relationship begins between the vengeful princess and her strongest slave. Will it end in hatred, in forgiveness, or in something far more unexpected?

Original Webtoon

https://www.cmoa.jp/title/352013/