进击的巨人OAD3：困难

During a 104th Cadet Corps wilderness exercise in which Jean and Eren once again display their rivalry, a gang of thieves steals the cadets' ODM gear and takes Christa as a hostage. The cadets put aside their differences to rescue Christa and their equipment, and together they overpower the thieves. When Armin later reports the situation to the commandant, he wonders if the attack was a part of their training all along.