Ms. Saeki quietly works at her desk without ever taking a break. Behind plain glasses, she is so kind and timid that she cannot refuse a request and even puts up with casual sexual harassment. No one imagines this ordinary office worker is secretly a married sex addict obsessed with huge cocks. When a coworker tries to protect her from the harassment, his well-meaning intervention opens the door to a dizzying world of sex, revealing the ravenous woman hidden beneath her modest exterior.