She divorced her husband 10 years ago and raised her son on her own. Her son also got a job and started living alone, but she didn't want to leave the house. She didn't go out even on her days off and slept all day. She invited her son on a trip to the hot springs. "Is there a woman you like, Masaaki?" "It's only for today..." She makes a one-day deal to appease her son. Her son's love is shot into her mother's vagina...
