In Dotenbori, Sagawa has taken Majima captive and has spent the night torturing him in retaliation for his betrayal. However, after realizing that he has no leads about the identity of the man in the white suit who took Makimura, he releases Majima and tells him to find out where the woman is.
Since Nishitani was the only other person who'd demonstrated interest in capturing Makimura, Majima concludes the man in the suit could be working for him. After roughing up some Kijin thugs for info, Majima learns that Nishitani is still in jail after their fight and that the only man who can help him get into said jail is Nishitani's uncle, a corrupt cop named Detective Billiken. Majima gets in contact with Billiken, who agrees to take Majima to Nishitani, but only if Majima participates in three fights in the Bed of Styx, an underground fighting arena that Billiken operates. Majima handily defeats his three opponents and Billiken takes him to the jail where Nishitani is being held.
As it turns out, Nishitani has the entire jail on his payroll and uses it as his headquarters. After another fight between the two, which Majima wins again, Nishitani agrees to tell him everything he knows. Nishitani and the man in the white suit weren't working together, but based on his description, Nishitani tells Majima that the man is Masaru Sera; patriarch of the Nikkyo Consortium, a dangerous and secretive Tojo Clan family. Nishitani also tells Majima that he only tried to kidnap Makimura because lieutenant Shibusawa of the Dojima Family paid him to do so.
Nishitani offers Majima a position within his family because he's impressed by his fighting skills, but Majima refuses, since insisting he has a duty to remain in the Tojo in case his imprisoned oath brother, Taiga Saejima, is ever released. Nishitani tells Majima that he needs to start living for himself instead of others and proceeds to open the jail cell where both had been locked up. Before the pair leave, however, one of the jail's guards guns down Billiken in front of a horrified Nishitani. The guard tells Nishitani that Shibusawa ordered his death for his failure to capture Makimura and then shoots him repeatedly. However, Nishitani doesn't immediately die from the gunshots and beats the treacherous guard to death before succumbing to his wounds.