Kiraware Majo to Karada ga Irekawatta Keredo, Watashi wa Kyou mo Genki ni Kurashiteimasu! summary:
A happy slow life begins with a switch! Marietta, princess of the snow country of Sneu, is trapped in a magic tower because she can't use magic. 8 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...?