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…