Reina Ishizaki worries that her divine J-cup breasts have lost sensitivity, so a specialist develops the axillary tail of Spence—the breast’s G-spot. Firm grabbing gives way to gentle lotion massage, and soon merely pressing a cock against the area makes her cum. She orgasms during titjobs, then convulses repeatedly when the gland is stimulated during penetration, ending so sensitive that simply jiggling her breasts triggers another climax.