Mami was involved in a minor collision on her way home from shopping. Since her injuries were minor, she was able to settle the matter, but she decided to keep it a secret from her husband, a civil servant striving for promotion, as she would be scolded if she reported it. Later, when her husband was away on a business trip for a few days, she went to the home of the person involved in the accident to apologize again, but he took advantage of Mami weakness and demanded obscene acts. In the end, the father and son both screwed their penises into Mami's vagina and devoured her pleasure, making her their sex toy.