Military Young Master's Sweetheart

In her last life, she was framed and imprisoned, and she was persecuted and tragically killed. The heavens were kind. They gave her a chance at rebirth, and in this life, they wanted to see just how she would take revenge on the scum of a man. However, this bodyguard was really a bit cool. He was even more arrogant than her, even more abusive than her. And more importantly … And... Marry her? Who was he?