It’s been five years after the Battle to Retclaim the Wall Maria... On the other side of the sea, Marley has finally ended its four-year-long war with the Mid-East Allied Forces. The head of the Tybur family, Willy Tybur, concerned about Marley's unfavorable position in the international arena, decides to deliver a globally significant speech in the Liberio Internment Zone, declaring war on Paradis Island in a bid to quickly reclaim the 'Founding Titan.‘
Meanwhile, Reiner is led by Falco into a basement, only to find Eren sitting there, waiting for him...At the moment, Eren, who has long infiltrated Marley, transforms into the Attack Titan, marking the beginning of the Battle of Liberio…