Yuria Satomi plays a lustful older sister who can't stop seducing others, freely enjoying sex in the everyday office setting. Newly hired and beautiful, Yuria is determined to climb the corporate ladder by manipulating her superiors with her expert seduction techniques. She repeatedly dominates her masochistic male coworkers in the cowgirl position, her aggressive behavior revealing her true nature as a teasing, nipple-and-lip-biting vixen. Before long, I too fall victim to her irresistible temptation...