Reiko, a life insurance saleswoman, accompanies Ichijo, the CEO, on a business trip to secure a large contract. Although there is no agreement that anything sexual will occur, as soon as they arrive at the inn, she is asked to provide sexual entertainment. She follows orders and licks and caresses him naked, providing deep throat service, and is immersed in rough, virile sex that is soaking wet with saliva, sweat, and love juices. In response to the perverted play, her whole body is dominated by pleasure and she becomes a masochist, and eventually she becomes addicted to the pleasure of sex that becomes a mess, accepting the cock until the sun rises...