Azusa, who was widowed 10 years ago, lives with her only son, Kenichi. However, even after her husband dies, her son does not show any pretense of working and has been staying in his room all the time. The income of this house is only a small part of Azusa's part-time, and Kenichi mindlessly begs his mother for money to play, but when he learns that it cannot be fulfilled, he dabbles in consumer finance without permission and expands more and more. Kenichi, who was in trouble to repay his debts, gets caught up in the sweet temptation that if he installs a hidden camera at home, he will wait for interest repayment.