K: RETURN OF KINGS

A year has passed since the School Island incident, where four of the seven kings fought for their lives to stop the evil Colorless King. Since then, Silver King Yashiro Isana has gone missing and the Green Clan JUNGLE has become more active in...

Blue King Reisi Munakata summons Kuro to SCEPTER 4 to learn more...

Green King Nagare Hisui orders his two most powerful clansmen...

Silver King Yashiro Isana finally makes his return...

The Red, Blue and Silver Clans agree to form an alliance to stand against the Green Clan...

Shiro gathers SCEPTER 4 and HOMRA to inform them about the Green King's past...

Green King Hisui Nagare enters battle. Unleashing his tremendous power, Hisui quickly makes his way up towards Mihashira Tower, where the other three kings stand by ready to face him.

Tenkei Iwafune is revealed to be the Gray King, who was thought to have died years ago during the Kagutsu Incident. Once a man of great virtue and compassion, Iwafune has since abandoned his own ideals to serve the Green King instead.

Kusanagi and Awashima infiltrate a party hosted by JUNGLE to get the list of attendees who are tied to the Green Clan. However, their attempt is thwarted by an unexpected figure.

Fushimi rises to the J rank and also becomes an administrator of the game. Captain Munakata steps down as Captain, after being fired by the Prime Minister, for being responsible for the thievery of the Slates. The Blue clan members are detained until further notice. It also seems that there are plenty of Green clan memebers at Government positions and that they are favoring the Green over the Blue. Anna tells Kusanagi that Shiro intends to destroy the Slates. When Munakata arrives at HOMRA, Anna tells him too about Shiro's decision to destry the Slates. He tells them that he still intends to aim for order, even when his Democles Sword is in danger. He remembers how the situation is similar to an year ago, when he was trying to stop the Red King. He also tells them that the alliance between the Kings is void, since he is no longer the Captain. Shiro comes up with an idea to destroy the Slates through his research. He also gives Kuro and Neko silver coins with the new symbol of the Silver clan and Kuro names the Silver clan as Hakumaitou. Shiro and Anna are influenced as the Slates are liberated.

As the Slates liberate power to all mankind, chaos arises among people. Nagare keeps all paths except the Yomito Gate closed and asks Iwa to 'greet' the Blue King while he guards the Slates. He tells Iwa that he can't be beaten since keeping connected to the Slates enables him to use his power without being limited to time. As Munakata and Goki advance towards the tower where the Slates are kept and are blocked by the Jungle U rank members. The Blue clan members gather intel and observe Munakata and Goki approch the Green clan members. Watching this, Awashima resigns from Sceptre 4, since she wants to join Munakata. As she hands over the rights of acting Captain to Akiyama, he orders Sceptre 4 to intercept the Green clan. As Fushimi opens the gates for the Blue King, he is deemed to be a traitor by Nagare and Sukuna starts a duel to death with him. As Iwa meets Munakata and Goki, the Silver blimp lands just behind Iwa, uninfluenced by his fog. Iwa and Munakata start to clash.

In a flashback, Munataka informs Yata that Fushimi went to the Green clan on his orders, since he was the only one capable of a successful infiltration, even knowing that it might result in his death. In the present, the Red clan members attack and cover the Green's hideout, making a way for the Silver King, Shiro and Neko to reach Nagare. In the meantime, Munakata, with the help of the Blue clansmen, defeats Iwa. As this happens, Munataka's Democles is reaching Down. Yata and Fishimi fight and defeat Sukuna and Yata tells him that if he is ready to go so far for the Blue King, then he has already accepted him as his king, and so is not a traitor. As Kuro and Yukari fight, Shiro and Neko reach Nagare.

Nagare informs that Neko was also present in the Kagutsu Incident, and she manipulated her own memory to live as a cat. Meanwhile, as Awashima stand ready to kill Munkata should his Democles reach Down, Anna takes the power of Red from all her clansmen and opens a path from the top to the place where Nagare, Shiro and Neko are, exposing them to the Democles of all the four kings. Kuro defeats Yukari and reaches Shiro. Meanwhile, Shiro tells Nagare that he has calculated that the power of Democles Down is enough to counter the power of the Slates and both can negate each other. He maximizes the Weismann level to the limit and brings the Democles down and effectively negates the power of the Slates. This results in Nagare's death, since he was only alive using the power of the Slates. On the other hand, since all the Democles disappear, Munakata is saved from death. Iwa arrives and asks them to escape the building, which is collapsing from explosions, but he stays back with Nagare. As everyone evacuates, the Silver King tells Kuro and Neko that he has to leave Shiro's body, since it was borrowed and he was only able to contain in it due to the power of the Slates, and that he has to return it to the original owner. In the epilogue we see that Neko has become a student in the school and the Silver King has returned into his earlier body and is a teacher in the same school.