Legend of the Millennium Dragon

One fateful summer, a group of elementary school kids set adrift on an abandoned apartment building must look within themselves to find a way back home.

With the help of the "Dragon Sin of Wrath" Meliodas and the worst rebels in history, the Seven Deadly Sins, the "Holy War", in which four races, including Humans, Goddesses, Fairies and Giants fought against the Demons, is finally over. At the cost of the "Lion Sin of Pride" Escanor's life, the Demon King was defeated and the world regained peace. After that, each of the Sins take their own path.

The "Academy Island Incident" in which four "kings" cross paths... Since then, Silver Clansmen Kuroh Yatogami and Neko have been searching for their master, Shiro. Without finding any clues to Shiro's whereabouts, the two became disheartened. However, one day, they see HOMRA members Rikio Kamamoto and Anna Kushina being chased by someone.

After battling their way through all seven Singularities, the Chaldea Security Organization has finally arrived at the endpoint of the Grand Order: The Final Singularity, Grand Temple of Time: Solomon. Now is the time to defeat the root of all evil, Solomon, the King of Mages. Now is the time to reclaim the future. With the final operation looming large, Romani Archaman considers the choices he will soon have to make, Mash Kyrielight dwells on life's limitations, and Fujimaru prepares to receive a new Mystic Code. All their many encounters have led to this moment as Fujimaru and Mash at last embark on their final operation...