Azusa, who lost her husband 10 years ago, lives with her only son, Kenichi. However, even after her husband's death, his son shows no signs of working and has remained holed up in his room. The family's only income comes from Azusa's small part-time job, and Kenichi's mother instinctively begs Azusa for money to play with her, but when he learns that isn't going to come true, he starts dabbling in consumer loans and the money grows.