In addition to her busy writing activities, popular author Saori is also suffering from stiff shoulders due to her voluptuous breasts, and frequently uses on-site massages. - Jojima has been undergoing treatment for a while, and is an ostensibly skilled masseuse, but he is a professional in the field of skillful stimulation and seduction of sexual acupoints. - Saori, whose sexual sensation has been stimulated by Jojima's treatment, is deceived by her words and becomes captivated by anal pleasure.