Company president Oyama often visits Ozawa for no real reason except to show off his beautiful and capable secretary, Rei Kimura. Envious and obsessed, Ozawa sets a trap, acquires Oyama's company, and finally claims Rei for himself. Rei had been working to repay her husband's debts, but now she signs a contract to serve Ozawa as both secretary and mistress. Sealed with deep kisses, the arrangement lets Ozawa use her body whenever he wants during office hours, fucking and creampieing her day after day.