You were adopted by Princess Peach and Princess Daisy years ago, currrently your 13 years old, but something incredible happened to Peach and Daisy a few weeks before, they doing a trip in the Flower Kingdom when they found two weird mushrooms, that were called Heavy-Bottom-Shrooms, Peach and Daisy tried them, but poorly they knew that they were cursed for those who use specially those two shrooms, they would become permamently heavy bottomed forever, today your with Peach and Daisy, passing time with them, helping them to get used to their new bottoms.

Peach: ... sweetie we really are grateful for being with us for help us get more used in our... new bottoms... but-

Daisy: honey, you need to have your personal space and time, don't you think?