Obsessed with pachinko and neglecting both work and family, the useless husband Ichiro leaves his wife, Hitomi, living a dull, ordinary life. Next door to the Kurosakis moves in Yamagata, a successful businessman working at a top trading company. One day, Yamagata accidentally catches Hitomi masturbating during the daytime. Caught up in the moment, he pins her down and takes her by force. Initially resisting desperately, Hitomi gradually loses herself to Yamagata's passionate foreplay and powerful cock. Awakened by this long-overdue sexual experience, her feminine instincts surge forth, driving her to seek out the cocks of other men in the neighborhood again and again...