In 1995, eager to escape their restrictive lives, Kiryu and his friends plan a heist at a local arcade. However, the arcade is under the control of the Doujima Family, a powerful yakuza organization that rules Kamurocho. Meanwhile, in 2005, with Kiryu set to be released from prison, he learns from Detective Date that his friends are in danger and he decides to return to Kamurocho to protect them.

1995. Kazama, who runs the Sunflower orphanage, had hoped that Kiryu, Nishiki, Yumi, and Miho would lead honest lives. However, contrary to his wishes, the four are ultimately plunged into the underworld of the yakuza. Meanwhile, in 2005, tensions between the Omi Alliance and the Tojo Clan are at a boiling point over a 10 billion yen heist.

1995. The Doujima Family closes in on Edgar's younger sister, who was entrusted with the official seal necessary for selling his land. Meanwhile, Yumi travels to Osaka in search of her estranged older sister. At the same time, the battle over Edgar's seal escalates. In 2005, Aiko disappears, leaving her daughter Haruka behind. Kiryu and Yumi decide to protect Haruka, but they soon make a discovery.