Popular salon "Nakao" favored by housewives troubled by postpartum nipple darkening. Known through word of mouth, its treatment not only cares for darkened areas but also gently nurtures the sensitive parts of the nipples, making it highly appealing. Visiting as a treat for themselves, they arrived without shyness, eager to make the most of their time. During the treatment, the deep understanding between women heightened the experience—stimulation targeting the nipples felt so good it broke down their composure. Discovering the deep pleasure hidden within their nipples, they resolved to explore this sensation on their own again.