Nôpan hisho: Monzetsu shachôshitsu(2003)

Megumi, the president's secretary, is also President Jojima's mistress. Her colleague, Hiroshi, has harbored intense feelings for her ever since they had sex once. One day, Jojima receives a letter from his wife, Yukie. Fearing his affair has been discovered, he is suddenly confronted by a young woman, Miki, claiming to be his daughter. Hiroshi then declares his desire to have sex with Megumi in the president's office. And then…