Ever since her father used up the last of the family fortune and skipped town, Kanae Otowa has lived in her family's ancestral mansion, Otowakan. With no way to pay off her father's debts, Otowakan is being foreclosed and Kanae must oust the remaining residents—her friend Sousuke Kagura, and two strange people who claim to be her father's acquaintances, Wolfgang Amadeus Mozart and Ludwig van Beethoven. After somehow...