A mother and daughter who were once close change drastically due to the mother's illness. The college-aged daughter becomes a wealthy man's mistress, offering her young body, enduring being bound and raped for her mother's sake, continuing to offer her body. She accepts humiliation in front of her university boyfriend and though she thinks about running away, she serves him more for her mother's sake. In such a life as a sex slave, she begins to feel happiness each time she is raped as a mistress.
