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It is currently the Meiji era. Blessed with both heritage and beauty, Satoko’s one wish is to marry for the good of the family. But suddenly, a mysterious assassin comes for her life. In order to make it out of there alive, Satoko makes the assassin a “proposal”. The daughter of an upstanding family, and an assassin. Romantic suspense about the contract marriage between two who should never have crossed paths.
Afflicted with a heart condition, Meiji-era noblewoman Satoko is determined to secure a marriage that will benefit her family before she dies. But before she can realize her goal, she's targeted by a mysterious assassin named Shinpei. In a last-ditch effort to save her life, she asks her would-be murderer to marry her. Her proposal isn't sincere, but unfortunately for her, Shinpei loves as intensely as he kills. Can Satoko find a way to break the engagement without losing her life?