A married man secretly hides the truth while swearing love to "Rin." One day, his marriage is exposed in front of her. When confronted, he admits to lying and shows willingness to atone for his sins. Upon learning the truth, Rin vows revenge. "It's because of this penis that you do such bad things, isn't it?" she declares, piercing through to the darkest depths of his heart. A fierce clash ensues, highlighting her unyielding will. This story deeply explores themes of love and betrayal, sin and punishment, powerfully drawing the viewer in.