The Yakuza Boss's Daughter Is Loved by an Assassin and a Scheming PrinceNew組長令嬢なのに暗殺従者と腹黒皇子から想定外に愛されています

In the Kingdom of Astrem, the king's principal consort has borne no children. As a result, the four princesses, all daughters of the king's concubines, are locked in a fierce struggle for the throne. Cordelia, the Fourth Princess, regains the memories of her previous life after being attacked by assassins. In that life, she was the daughter of a yakuza boss. However, after becoming caught up in a conflict between rival criminal organizations, she was ultimately murdered by someone she held dear. "I never want to be betrayed again. I'm tired of fighting and killing each other." Although Cordelia wants nothing more than to stay away from such conflicts, her attendant, Václav, encourages her to stand up for herself. Eventually, she resolves to become the kingdom's next ruler. Just then, her father presents the four sisters with a marriage proposal from a neighboring country. The prospective groom is Oscar, the Second Imperial Prince. And there's a condition that could change everything: Will the princess who manages to win Oscar's heart become the next queen?! Once a timid, sickly, and weak-willed princess, Cordelia now possesses the fearless spirit of a former yakuza heiress. And so begins a battle she absolutely cannot afford to lose! "I simply can't forgive their dishonorable methods! After all, I used to be a yakuza boss's daughter!"