Marina has been increasingly dissatisfied with her sex life with her husband lately. She tried buying sexy lingerie to improve the situation, but it had no effect, and she ended up masturbating next to her husband who fell asleep first. One day, her husband brought his subordinate Shimada home after a drinking party, and Shimada was captivated by Marina's sexiness and beauty. Noticing his gaze, Marina decided to use Shimada to release her pent-up sexual desires while her husband was passed out drunk, and began to seduce him…
