Duke, that man is my real brother

In a fantasy world where secrets are deadlier than swords, Astel awakens as the hidden sister of the lead protagonist. Her mission: infiltrate the northern Duke’s castle to hunt the ultimate villain. But fate takes a cruel turn when she becomes the ‘imprint partner’ of Duke Anais—a savage beast of a man and the prime suspect for the final antagonist. Bound by a primal bond that demands daily intimacy to survive, Astel finds herself trapped in a dangerous game of desire and deception. As the Duke’s obsession grows and he plots to erase her brother from existence, she must navigate a web of lies to uncover the truth. Will she survive the beast’s embrace? Dive into the mystery and discover the truth in Chapter 1!