12-siui Marionette

Siora spent her days as the servant of an ancient god until she was sucked into a novel and possessed characters close to the male lead, Duke Kruelo Whitedesert. A mysterious voice tells her that if she prevents Kruelo from destroying this world, she'll return to her own. But the duke's life is fraught with danger, and she dies twice before accomplishing anything. With time running out, will Siora finally be able to go home, or will Kruelo's treacherous life kill her for the third time? (Source: Tapas)