KAM-126 - A wife with a large bust and hips is intensely harassed by her sexually harassing father-in-law, whom she despises, while being spied on during masturbation and witnessing infidelity. Haruna's pent-up desires explode into a climax.

A voluptuous married woman lives with her husband's father. Her busy husband is often away on business trips, leading to a lack of marital intimacy, and the frustrated wife masturbates. The father-in-law spies on her and leers. One day, a delivery driver, her lover, comes and they have sex, but the father-in-law is watching again. The father-in-law then demands her body, using the witnessed masturbation and infidelity as leverage. Threatened with exposure to her husband, she reluctantly submits. Furthermore, the wife is repeatedly sexually abused by the father-in-law, whom she deeply despises, and is subjected to forced sexual acts.