MIAB-636 | Hikaru Miyanishi, a creampie masturbation wife who has been developed to have a strong orgasm in her vagina every time she is palpated by her father-in-law (an obstetrician and gynecologist) who knows everything about the uterus and can be used at any time.

A beautiful wife who has been forced to develop vaginal orgasms with each physical examination... Hikaru, who has been struggling with infertility, is encouraged by her mother-in-law to have a uterine check-up with her father-in-law, an obstetrician-gynecologist. Hikaru is reluctant, as he is family, but she accepts it as a medical procedure and the examination begins. His tenacious fingers, relentlessly rubbing her sensitive spots, have her private parts soaked by the end. Even though she knows it's wrong... she finds herself becoming addicted to pleasure with each treatment from her father-in-law. Before she knows it, she grows tired of her husband, whose sexual desire and penis are weak, and she only desires her father-in-law's cock... Trained as a lewd masturbator, she even orgasms with incontinence... She spends her days cumming inside him, creating time for the two of them under the guise of a medical examination. Will the child she conceives be her husband's, or...?