Komatsu and the gang dive under the sea and reach Blue Grill, and it’s more intense than any of them could have ever imagined! The underwater civilization is full of master chefs with amazing talents and everyone is eager to put their skills to the test! But this Giant Clam is rotten at its core, with a lot of shady business going on behind the scenes. To enter the Back Channel and reach Another, Komatsu and the gang must defeat the masked rulers of Blue Grill, the Five Ten Shell Masters, to prove their worth—or literally die trying.