Shoichi Yamaguchi has a second wife named Tomoko. - This Tomoko is an extraordinarily slutty woman who wants sex every night, but Shoichi hasn't been able to have sex with her for the past year. - This is because the company's situation is not good and I am exhausted from working hard every day. - At that time, Shoichi witnesses Tomoko masturbating. - Shoichi feels guilty as a husband, but an idea flashes in his mind. - The idea was to make his wife fall in love with another man.