Your Highness the Regent, Your Assassin Is a Bit Dense! Novel

Jiu Yue dies and receives a system mission: marry into the royal family to return to the real world with a billion-dollar reward. However, the system's transmission delays, leaving mission details incomplete. Confident in her assassin identity, Jiu Yue heads to the capital with her broadsword. By the time the system reconnects, she has become the Regent's top assassin—and has already killed her intended betrothed, Prince Ping. When the system reveals her actual mission is to marry Prince Ping, Jiu Yue is horrified. Regent Sima Qing discovers an assassin has infiltrated his ranks and orders a manhunt. Instead, the assassin volunteers to join his forces, claiming she kills without hesitation. Sima Qing sees through her disguise but allows her to stay, using her skills to eliminate enemies while waiting for her to make a fatal mistake. After six months, Sima Qing uncovers her true identity. On their wedding night, he hands her ceremonial wine, remarking that a cup is easier to hold than a sword.