Yumi's father's company was taken over by Maria. Maria, a lesbian, has her eye on her, and as a condition for staying at the company, she offers her body to her... Maria desires Yumi day and night, and becomes addicted to the endless pleasure. At first, she enjoys toying with Yumi's voluptuous body, but before she knows it, she becomes captivated by her and lets her huge breasts get played with... With the tables turned, Yumi does not miss this opportunity and puts into action a plan she has been thinking about for a while regarding Maria.