Yui, a wealthy female student whose father is the president of a major corporation. Her father is always busy with work, so she lives almost like a single person every day. But behind her face as an honor student, she harbors a masochistic desire to be attacked by a man. One day, she is caught masturbating by a delivery man named Nakata, who then forces her into sexual acts. Since then, she becomes Nakata's sex slave, being trained in lewd acts...
