Waka has raised her son single-handedly since her son divorced when he was young. She worked hard for her children, and she always put up with what she wanted. With her son, she doesn't need anything else. She thought so and tried her best, but nothing could be done about the loneliness of her body. One day, she encounters her son reading an erotic book with her friend. At the same time as receiving her shock, her libido that she had been suppressing up until now came up.
