In 1995, an overworked Miho falls seriously ill. Nishiki, deeply concerned for his sister, finds himself at the mercy of Doujima's scheme that exploits his vulnerability. In 2005, while Kiryu and Yumi continue their search for Aiko in Osaka, they encounter Chairman Goda of the Omi Alliance, who forces them to promise to return the 10 billion yen by midnight the next day.

1995. The bond between Kiryu, Nishiki, Yumi, and Miho, who had been there for each other like family, tragically falls apart. 2005. Can Kiryu prevent a war between the Tojo Clan and the Omi Alliance? How will Kiryu and Nishiki resolve their 10-year-old conflict? And what is the true identity of the Shinjuku Devil? With rising tensions, they face the final battle in Kamurocho.