Jipchang Malgo, Ihonhae Juseyo!

Edelis Brill, the beloved only daughter of a countess, sees herself stabbed to death by the emperor's sword in a book she discovers in her study. Seeking to change her fate, Edelis rescues the book's sole main character, the slave gladiator Lehan, and pours her endless affection into him. But! Lehan, whom she believed would protect her from the emperor's blade, has returned as the emperor, intent on her heart?! Edelis tries to escape, but Lehan's obsession grows ever stronger... Stop obsessing, divorce me! (Source: KakaoPage, translated)