Members of SWORD win against Wangan Rengogun, which is led by Kohaku. The city becomes peaceful again. Nevertheless, the most brutal gangs, Doubt and Prison Gang, appear. They try to dominate the area controlled by SWORD.

Bent on revenge, a traumatized ex-police officer must infiltrate a yakuza organization by befriending one of the group's most unhinged members.

Shinji’s life has been ruined by the crime that his brother, Kyosuke, committed. Unable to forgive him, Shinji keeps his brother’s crime a secret from his fiancée. As Kyosuke is about to be released from prison, Shinji’s fiancée discovers the secret and leaves him. He is also left to reconcile with his estranged mother, while being pestered by a journalist who prompts him to rethink the reason for his brother’s actions.

At the end of the Edo Period which brought the era of the samurai to a close, Ryu is the descendant of a "genin", the lowest rank in the ninja hierarchy. Due to such a low rank, he lives a miserable existence. Then a secret order is received from Katsu Kaishu bidding for the recovery of princess Shizuka, a Satsuma native, from the home of a prominent vassal in Edo.

Fifth grader Kei Watanabe has inherited the hunter's blood to hunt yōkai. To save the world from destruction, Kei challenges a war against the yōkai.