Nene and Asaka's parents suddenly run away from home. Then came the debt-collecting faun. Nene's father says he owes them 100 million yen. Faun says that if Asaka becomes her mistress, he will write off her debt. She was in love with Nene's mother, so she wanted an Asaka that looked exactly like her mother. Of course, Asaka and Nene refused, but they had to pay back 100 million yen within a year! Their 100 million yen repayment strategy begins... "Account book 1 Helper OK!?" Below "Account book 2 Assistant OK!?"