Aoi lost her mother at a young age and lives with her father. One day, she returns home to find a strange man there. She learns that he is an acquaintance of her father. From that day on, the man stays in the house and her father never comes home. A few days later, the man's acquaintances arrive and Aoi learns that she has been sold to pay off her debts. From that day on, the Aoi do whatever they want to Aoi...