Rina works at a small bank branch, serving as a female teller handling daily operations. Rumors had spread about the female staff engaging in sexual relationships with male employees, often fooling around inside the vault during work hours. Among them, Rina had developed a twisted relationship with the branch manager, who would sneak peeks at her panties whenever they entered the vault together to check important documents. One day, Rina was caught secretly embezzling customer deposits. Instead of reporting her, the manager decided to secretly exploit her, forcing her into lewd acts. During regular work hours, Rina was made to wear extremely short pants with a vibrator inserted into her crotch, which the manager delighted in monitoring for his own pleasure. After work, as other employees left, only Rina and the manager remained inside. Suddenly, all the lights went out, and with the emergency alarm system disabled, they were unable to call for help. At that moment, two burglars broke into the branch. With the doors automatically locked, the intruders couldn't escape and were quickly restrained. The aroused burglars gradually began sexually harassing Rina, throwing the manager into confusion as an unexpected turn of events unfolded.