Tokyo Family Court judicial research official Akira Yamanobo is in charge of Tetsuo and Ayano Katase's divorce arbitration. Ayano, the wife, who works for a boutique company, insists her husband is involved with another woman. Supported by her employer Kotomi Saegusa, the company president, she demands a divorce as soon as possible. On the other hand, her husband Tetsuo, a trading professional, denies having a relationship with a woman. He says he will not agree to the divorce and does not plan to let his only son Kenta go, so the arbitration continues. According to Akira's investigation, Ayano gave birth to Kenta as a single mother five years ago when she was working as a hospital clerk, making him Tetsuo's stepson. Tetsuo loves Kenta as his own child, so Akira doesn't understand why Ayano is so insistent on getting a divorce. However, Tetsuo's insistence on not giving up custody of his stepson Kenta is also very unusual.
A serial killer leaves behind a trail of headless bodies; the special agent assigned to the case begins to uncover the supernatural truth, as his young protégé falls for a beautiful girl who may be more than humanity can handle.
Natsuko is witnessed carrying on an affair with her boss, Misawa, by the unmarried Chieko. However, Chieko dies by falling and is found about ten days later in the shrubbery in front of the company. It is revealed that Chieko led a flashy private life and frequented a host club. Moreover, it seems that she was having an affair with Division Chief Yamazaki.
The clerk of a trading company happens to have a large sum of money from his company in his possession. His girlfriend pressures him into fleeing with the money...
The final part of the trilogy. It is about a younger brother, Suekichi. He learned well the lessons that life taught his older brothers. Therefore, he does not think to study, but strives for material well-being alone. To make a career, he ruthlessly pushes his colleagues with his elbows. For him, the high ideals of trade union activists Jiro and Saburo are an example of old-fashioned thinking, naive behavior.
