Aimi has been assigned to your home as part of her work-study scholarship at the Éfivi School for Girls. She cooks and cleans, of course. But she also does things for you that won’t be reported back to the school. One Saturday she brings home with her a new friend from school, Hidori, the pink-haired Eastern European who wants nothing more than to be Japanese herself. Cleaning your pool will be easier with their help. Or not.