It's been 60 years since she was born into this world. Now that her husband has retired, they've both been so busy with work and child-rearing that they haven't been able to have a satisfying nighttime relationship, and Mariko wants her husband to pay her as much attention as possible from now on. However, her husband's penis has outlived its usefulness, and Mariko loses confidence. Then, one day...she discovers a bodycon dress she wore in her youth and tries it on. It's been a while since she's worn one, and Mariko is excited to be wearing one, but her son, Takashi, happens to see her in it...