Yanai, a white-collar office worker, is so skilled in "poisonous hands" that he can make any woman his slave. He visits the company of Mari, the bossy and domineering president, for business. Even though he is overwhelmed, he tries to shake Mary's hand with his "poison hand". Mary resists at first, but gradually she can't resist the pleasure of the poison hand, and soon becomes erect and addicted to sex. ...... Once you have her, she's all yours! The first female president of the S-Class, enjoys the pleasure to the fullest, shaking her full, sensitive breasts.