Kurumi found out that her beloved boyfriend likes big breasts... To make her breasts bigger, she asked her massage therapist stepfather, and with incorrect sexual knowledge, she developed 'Spence's glands'!! Her still-developing, unfinished body has continuous orgasms! Her small breasts are treated, her nipples are kneaded and played with... her body becomes more and more sensitive. A runaway creampie orgasm with pleasure beyond imagination!! To please her boyfriend, she's developing Spence's glands with breast massage today too!