Momiji is a high school student whose father has passed away. In her effort to help her mother with the family finances, she's become very busy with both house chores and part-time work. At school, she is bullied for her cute looks by Erika, a boss-like presence in her school... Despite this, she continues to work hard every day with a smile on her face.

Then one day, after accidentally incurring the wrath of Erika, the two of them suddenly found themselves transported to another world!? Erika is now the story's typical heroine and Momiji is... the chubby villainous noble girl!?

The curtain now rises on this ugly battle between two girls who have been transported to another world to find their roles reversed!