It is a satirical story, constantly deceiving each other for their greed, to wake up those who want to get something without effort.
Sugungga is a more complicated story than you might think. Depending on how you look at it, the subject can change greatly. For this reason, there are many different names, such as Sugungga, Byeoljubujeon, Tokkijeon and Tobyeolga. The story begins with the dragon king becoming sick. The medicine that the subordinate turtle found is rabbit liver. So, the turtle goes to land and tricks the rabbit, but the Dragon King is deceived by the rabbit and lets the rabbit go. The rabbit, who climbed back to land, outran the turtle, overcame various obstacles and wisely but cheekily climbed up to the moon.