I Swapped Bodies with a Wicked Witch, but Today I'll Keep Having Fun!

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. 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...? ___ [Original Web Novel](https://ncode.syosetu.com/n5433ls/)