Busty beauty Mio Kimijima enters the Spence Breast Development Clinic, where a newly introduced device stimulates the so-called G-spot of her breasts until she repeatedly climaxes and loses bladder control. An expert gives her a first breast orgasm, followed by nipple-teasing sex, toy play that makes her leak urine and Spence titjobs. She is swept into a storm of orgasms triggered through her huge breasts.