Azusa secretly films her neighbor's wife, Sae Fujiki, masturbating. Holding this secret over her, Azusa uses the videos to force Sae into sex. She lures Sae into lesbian acts by making her smell her armpits, gradually becoming addicted to Sae's desire. A story of age-gap lesbianism as a married woman experiences lesbian sex for the first time and sinks deeper into it. Azusa, obsessed with the affair, and Sae, repeatedly meeting for secret trysts, both drown in lesbian pleasure. Eventually, Sae's true nature is revealed—her hidden identity as a masochistic pervert comes to light.