Synopsis: Tanabe Yuuka was a happy housewife. Her husband loved her and she also loved him. She would wait everyday at home making dinner for his husband, the next day she would prepare breakfast and give him a good bye kiss. She led a very ordinary life without inconvenience. All that changed one day when a man appeared at her home, she opened the door and the man immediately stripped off her clothes and made love to her. She didn't like it but could not help it but feel pleasure.  She felt as a sinner, she betrayed her husband but from that day on the man would come to her home after her husband had left to work and she would  invite him voluntarily inside her home. However does her husband really does not know what is going on? Soon she would find out the truth!...