Live from the Deep Sea with a Dragon Prince

Chu Feng risks his life diving for a freighter boss to pay for his little sister's surgery, until he sees the boss smuggling and has his safety line cut a hundred meters down. Instead of drowning, he finds the hidden inheritance of the Dragon King's Third Prince: he can breathe underwater, command the sea and carry its treasures in a secret space. Now he's back on the docks, and the man who left him for dead is about to pay double.