Misfortune strikes suddenly. An honest office lady who has done nothing wrong is sold to a certain SM brothel for a high price by a despicable young president in order to clear the company's secret debts. Suddenly abducted and imprisoned, and subjected to merciless training by the perverted manager day and night, the woman gradually loses her rebellious Kokoro and learns the techniques to please the customers. One day, the young president appears as a customer and rapes and tortures the woman. The woman realizes what the president is up to, but by that time she has already become the most popular anal prostitute.