Husband is away for work. Her only son has stopped going to school and become a shut-in. Just as Hibiki leaves for work as usual, she remembers forgetting to tell him something and returns home, only to find her son masturbating while clutching a pair of pantyhose. The son, who always spoke of how much he loved his mother's pantyhose that comforted and encouraged him, triggers an unexpected reaction from his sexually frustrated mother, who impulsively decides to cheer him up in a way neither of them anticipated.