azusa secretly films sae, her neighbor's wife, masturbating. she blackmails sae with the video, forcing her into sex! azusa lures sae into lesbian sex by making her smell her armpits. eventually, the wife becomes addicted to her daughter's lust. the wife, experiencing lesbian sex for the first time, gets hooked on their year-gap lesbian relationship. azusa, aroused by their adulterous affair, and sae, who becomes obsessed with lesbian intercourse, eventually reveal sae's true nature as a masochistic pervert.