The Demon Lord's Domain has been liberated, ushering in a new era. With the demons no longer a common enemy, the threat of a power shift hangs in the air. Who will triumph if the Maritime Alliance led by the Kingdom of Friedonia clashes with the Great Tiger Empire of Haan? While Souma is busy mobilizing his personnel for the impending conflict, Yuriga approaches him with a shocking request to return home. As it turns out, it's merely part of Yuriga's plan to corner her own brother, the Great Tiger Emperor!