Yume's boss, Sayama, has been fond of the cheerful and popular Yume for a long time. One night, he bumps into Sayama at work while he is marking Yume's belongings with semen. He is shaken by the sight of Yume in front of him, but is also Kokoro and rapes her on the spot. As he blackmails her about the events of that day and continues to rape her, her body begins to feel humiliated, contrary to what she thinks. Yume's body has become unable to live without her boss's huge cock...