Reikoku Mujihi na Otto to Karada ga Irekawattara, Omotta Yori mo Dekiai Sareteimashita @comic

Mia had been treated coldly within the household after entering a political marriage. One day, for some inexplicable reason, she dreams that she has switched bodies with her cold-hearted husband, Vil. After experiencing a day in her husband’s life in the dream, she wakes up to find that her situation within the household has somehow changed…?! What on earth happened?! Was that a dream, or was it reality…?! A chaotic, sweet romantic comedy about a husband feared as the Devil of the Battlefield and his beautiful, talented, angel-like wife, featuring misunderstandings, body swapping, and over-the-top affection. (Source: Manga One translated)