Ocean: From Boat to Carrier

In an ocean apocalypse, Ethan Voss is betrayed by his brother and fed to mermaids. He binds the "Ocean Sovereign System": upgrading a boat to an aircraft carrier. He uncovers the truth: a "Sky Citadel" above the ocean deliberately flooded the world to screen "superior humans". Ethan, piloting an aircraft carrier, challenges the gods as a mortal! This is an epic doomsday revenge story.