Kiraware Majo to Karada ga Irekawatta keredo, Watashi wa Kyou mo Genki ni Kurashiteimasu!

Synopsis

A happy slow life begins with a switch! Marietta, princess of the snow country of Snewe, is trapped in a magic tower because she can't use magic. Eight years later, on her wedding day with the prince of the silver country, she thought she had succeeded in summoning a holy beast, but then... What appeared was...? (Source: Akita Shoten, translated)