"Sex with my husband has always been unsatisfying..." says Azusa Morisaki, 50, a mother of two. Her relationship with her husband is good, and even now, in their 25th year of marriage, they still have sex twice a month. However, ever since she learned to masturbate with a vibrator, she no longer feels any stimulation from her husband's thrusts, and her body has become unable to orgasm during marital intercourse. The days when she can't orgasm with his penis are empty. But she can't give up the vibrator... She's been agonizing over this for several years. She's determined to break this situation...