What is "nalong"

Nalong ( hangul:뚜루뚜루뚜 나롱이, Turuturutu Narongi) is a Korean animation, also known by the name Nalong, Fly To The Sky. It is a product of the major anime broadcaster Munhwa Broadcasting Corporation, and the animation was done by Studio Kaab. The story centers on the animal character Nalong, a flying squirrel.