Yuki Yamaguchi is 54 years old. She and her husband will soon be celebrating their 30th wedding anniversary, and they still make love about twice a month, but "it's not enough. I'm not satisfied..." She usually works at a school lunch center, and it's surprisingly physical work, stirring large amounts of ingredients and carrying heavy pots every day. But maybe that's why she has nowhere to put her excess energy... "It's embarrassing, but I masturbate secretly almost every day..." Today, we're going to let Toshie unleash her sexual power to her heart's content!!