Lee Donghae and Lee Sungmin are brothers. Twin brothers. But they don't look alike. After several years in staying in the US, they decide to move away. They stayed inside a ship that travels around the world nonstop (unless it sinks). And also, their parents enrolled them into a school inside the ship. But they have to work for their own money. They meet their fashionista friend, Tiffany, which her father owns the ship. They meet again the bossy, annoying and kind of funny manager Lee Sooman. They also meet their own lovelines: country girl Sunny and smoothie waitress Jessica. They found a new, slobby and fat "bro", Leeteuk (sorry Teukie shippers!). But, will their friendship last forever?

~CHARACTERS~