"You've been staring at my ass, haven't you?" My voluptuous, sexually frustrated female boss, who can't help but notice my ass even at work, is now being sexually exploited in a cowgirl position whenever she has free time, under the guise of training. (Yumi Kazama JUR-850)

Recently, Yumi has been troubled by weight gain due to increased business dinners with clients. For her health, she takes advantage of company benefits and starts going to the gym with her subordinate, Kazuki… Meanwhile, feeling sexually frustrated due to a lack of intimacy with her husband, she takes advantage of his tendency to stare at her buttocks, using him as a way to release stress. Kazuki, already captivated by her voluptuous buttocks, is confused by this sudden and unreasonable sexual harassment, but unable to resist the direct stimulation of his sexual desires, he succumbs to the advances. Then, unknowingly, the two begin to secretly enjoy pleasure even during work hours…