Company president Ozawa has always coveted his striking secretary, Ayaka Muto. But when she marries employee Yusaku and the couple plans to start their own business, Ozawa's jealousy erupts. He pressures Yusaku's clients until the new company collapses, then offers debt-stricken Ayaka her old secretary job back—with a new condition: during working hours, she must also serve as his mistress. He seals the contract by taking her lips, and from that day forward the president's office becomes a den of sweaty kisses, sex, and creampies.