In this popular series that develops women's new erogenous zone, the "Spence Gland," the stunningly beautiful Mai Itsukishi makes her appearance! The Spence Gland is the G-spot of the breasts! Undergoing development by a specialist in Spence Gland research, she experiences her first-ever breast orgasm! Through various Spence Gland massages, her body writhes and screams in ecstasy, reaching a climax of intense spasms! Her sensitivity collapses under the teasing Spence sex, leading to multiple squirting orgasms! When her nipples are slowly stimulated with toys, she drools profusely, her legs tremble uncontrollably, and she pees so much that her body is completely drained of moisture! After relentlessly teasing her nipples, she's driven to complete Spence Gland awakening through intense Spence sex, culminating in a massive orgasm!