Three stories of Itsuki Maino's massive breasts. 1. Breast exercises. Her breasts jiggle spectacularly with jump rope, hula hoop, and balance ball. 2. What happens when she shows her masturbation to a female masseuse...? Itsuki is shocked by the huge penis of a male customer... 3. A massage parlor specializing in massive breasts. She visits to discuss her everyday body concerns, but somehow ends up having her underwear removed and receiving an erotic massage! She is captivated by the pleasure of the vaginal massage.