A former S1 exclusive and former idol joins the popular series that develops a woman's new erogenous zone, the Spence's gland! Miyu Aizawa, the most beloved busty actress, appears! The Spence's gland is the G-spot of the breast! Developed by a specialist in Spence's gland research, it makes her arch her back in ecstasy! A mammary gland development massage sends pleasure through her beautiful big breasts, causing her to convulse and scream in ecstasy! Nipple teasing sex transforms her cute face and voice into a lascivious squirting orgasm! A toy massage that completes the Spence's development leads to a massive incontinence! Her sensitive, erect nipples are kneaded and twisted, bringing her to an intense orgasm that blows her mind!