Lucca finishes her newest invention to help Noelle fly: the "Bu Bu Bloomers". With the bloomers, Noelle will be able to fly using (oddly enough) the power of her own farts, as they're converted into energy by the machine. Unfortunately, Noelle can't fart on command, so Lucca sets out to buy her some roasted sweet potatoes to speed up the process. Coincidentally, Eros is also on a mission to buy roasted sweet potatoes for Silky in hopes of currying her favor. And, what's more? Mikael and Raphael are selling sweet potatoes from a cart in order to earn money to pay their rent...