A "side story" film centered on Onaga Terukuni (Kyan Yutaka), the Captain of Yuusei Group, a subsidiary of the Kawatani Family. A legendary assassin is released from prison, and Teru is charged by Himuro (Motomiya Fujikaze) and Tamura (Yamaguchi Yoshiyuki) to welcome him back. But who he meets appears to be a senile old man who may need more help than he realizes ...
From rising cult filmmaker Kenichi Ugana, a misfit horror-themed rock band moves to the Japanese countryside to write the greatest punk anthem in the world.
A message arrives on Himuro's smartphone from his son Yuta, who is now a high school student. Himuro stares at the message with a startled expression. The message is a single word - Revenge. Then, there is a picture of Yuta, gagged and staring resentfully at the lens. "A school trip to Taiwan... Revenge..." Himuro assumes that the remnants of the "Black Dragon" who killed Kaku and his friends in Okinawa have kidnapped Yuta to take revenge on him, and immediately decides to go to Taiwan to rescue his son.
There was a burglary at the Yusei-kai Kazo branch. Fortunately, the money had already been moved from the safe, but Teru (Yutaka Kiyatake) is in shock. He kicks out Sakuragi (Takuma Sugawara) and others and locks himself in his office. Himuro (Yasukaze Motomiya) and Tamura (Yoshiyuki Yamaguchi) are worried about Teru's strange behavior, but there is something that Teru must get back...
Shizuya (Ito Kentaro), the only son of the Kanto region’s largest gang, the Shinshu Clan, which he hates being associated with, works instead for a design company. He works diligently while developing a liking for his strong-willed colleague Akino (Kakei Miwako), but when his father is shot and killed, the battle for succession intensifies. Peaceful lives are transformed.
After a Kyowakai member is killed, detectives Shima and Hayami investigate the case, which is connected to recent unsolved murders. Kyowakai also launches their own investigation to avenge their comrade, intertwining their efforts with the police. The case involves a large organization framing Kyowakai.