The main characters heads out into the ocean after obtaining the Airseed, to finds a whirlpool that was mentioned by a citizen of Northeast Town. Once the whirlpool is found, it drags them to the bottom of the ocean. Thanks to the Airseed, it allows them to breath underwater. Near the whirlpool, they enter the town.
A citizen mentions that Ryu-O now lives on the ground above. They learn the Sei-Ryu cherishes the Red Orb and Ryu-O has the Blue Orb.