Hino Mariya is an office lady who just won 300 million yen. While walking through the city and wondering how to spend her new wealth, she dropped her pass book. A passing girl picked it up and handed back to her, but saw how much money she had in her account and asked her to provide for her, as she is currently homeless due to some circumstances. Mariya then got fast talked into letting the girl live with her as she is just her type.