That Time I Got Reincarnated as a Slime the Movie: Tears of the Azure Sea

Rimuru’s duties expand from festivals and treaties to a formal invitation from the Celestial Emperor Hermesia of the Magi Dynasty Salion. He accepts a visit to a resort island that sits inside Salion’s jurisdiction and brings trusted companions for what is meant to be rest and quiet talks. The break ends when a woman named Yura appears and an incident turns the surrounding waters into the stage for a dispute that touches on Salion’s authority and on Tempest’s safety. Rimuru treats the chaos as a problem to map rather than a duel to win. Scouts secure civilians. Allies test whether the threat is magical pollution, a summoned entity, or a weaponized relic hidden under the bay. Negotiations run beside containment. Every step weighs public image against the obligation to protect guests and crew. The solution depends on reading the sea itself and on choosing when to reveal strength. When calm returns the island is still standing and a new channel with Salion is open, but Tempest has one more neighbor to watch.