Ten years ago, Azusa lost her husband. Since then, she's been living with her only son, Kenichi. However, even after her husband's death, Kenichi refuses to get a job and remains holed up in his room. The family's sole income comes from Azusa's meager part-time work. Kenichi constantly asks his mother for money to spend, but when his requests are denied, he secretly takes out loans, which quickly spiral out of control. Desperate to repay the mounting debt, Kenichi falls for a tempting offer: if he installs hidden cameras in their home, the lender will agree to postpone interest payments...