Michio was asked by his wife's friend, Ayana, to be a beauty monitor. There, his nipples, his sensitive spot, were played with and he ejaculated during the treatment. Michio was embarrassed to have ejaculated in front of everyone, but Ayana came to his house as if nothing had happened... Ayana, who has a strong sadistic streak, licked his nipples over and over again, enjoying their sensitive reactions. Unable to forget the immoral stimulation of having his nipples kneaded and toyed with, Michio returned to the beauty salon where she worked, seeking further pleasure...