Despite having magnificent breasts, Riko suffers from the problem of being numb all over her body. She visits the 'Breast Research Institute.' There, she is made to drink an 'orgasm-inducing agent' and has her large breasts fondled repeatedly until she gradually becomes more sensitive. Furthermore, she is subjected to full-body low-frequency stimulation, electric massagers, and vibrator torture. Restrained and covered in a special lotion all over her body, she undergoes intense breast massage & deep throat torture as part of her pleasure therapy, becoming completely sexually developed. In a threesome with the directors, Riko shakes her large breasts wildly as she is fucked to orgasm after orgasm!
