After the events of the original series, Liddy, a duke’s daughter who was reincarnated from modern Japan, has formally become betrothed to Crown Prince Freed of Wilhelm. Though she once tried everything to escape the royal family’s polygamous traditions—including a failed plan that accidentally led her into Freed’s bed—she now begins to embrace her role and acknowledge her growing feelings for him. Their newfound intimacy is tested by dangers from both outside and inside the kingdom. A figure from the assassin Cain’s past resurfaces with a sinister mission in Wilhelm. At the same time, Maximilian, the crown prince of the neighboring Sahaja, arrives ostensibly to congratulate the couple but secretly eyes Liddy for himself. After a kidnapping attempt, Freed moves Liddy into the royal palace for safety, where the two share a room, strengthening their bond. The story blends romantic development with political scheming and looming threats as Liddy and Freed navigate the perils of their engagement.