Moto Ansatsusha, Tensei Shite Kizoku no Reijou ni Narimashita

Serena, once a deadly assassin, finds herself reborn as the daughter of a powerful duke after a mission gone wrong. She assumed blending into noble society would be simple, but reality proves far more complicated. Her mother’s whimsical nature and her cunning stepsister’s schemes to undermine her make fitting in a constant challenge. Though adept at avoiding the traps set by jealous peers during high-society gatherings, Serena’s icy demeanor leaves her an outcast in the cutthroat world of aristocratic school life.

When she learns her stepsister is betrothed to the kingdom’s second prince, Serena makes a desperate escape, unwilling to endure further manipulation. But fate has other plans—Evan, the enigmatic first prince, suddenly crosses her path, altering the course of her new life. His unexpected appearance forces Serena to confront her past and reconsider her future in a world where power, deception, and hidden motives shape every interaction.

As tensions rise and loyalties are tested, Serena must navigate treacherous political games while concealing her lethal skills. The line between ally and enemy blurs, and the secrets she carries could either save her or destroy everything she’s struggled to protect. With danger lurking in every shadow, Serena’s journey becomes a battle for survival in a society that demands perfection—and punishes weakness.