Airi Nan portrays a married woman who experiences orgasm through persistent nipple manipulation. "I thought it was just a massage..." Airi goes to a massage parlor on her husband's recommendation, only to have her large breasts kneaded and her nipples manipulated for a longer time than a massage, giving her a long-lost experience of orgasm. She regrets not refusing, but the following week she can't resist returning to the erotic massage parlor. As time goes on, her nipple sensitivity increases. She is touched, manipulated, and licked, finally reaching orgasm. Ultimately, she even receives nipple massages next to her husband, and their happy family is shattered because of her nipples...