Exclusive performer Kanna Miki visits the popular clinic that develops a new female erogenous zone known as the axillary tail of Spence—the “G-spot of the breasts.” A specialist works her sensitive J-cup body into its first breast orgasm, triggering wave after wave of climax, squirting, and convulsions. Further stimulation with toys leaves her so sensitive that she cums during titjobs, across three sex scenes that continue until breast orgasms make her faint.