Raspberry and Mango

toptopia:

Tree Frog by Psy feat. GD
I felt like it would be kind of hard to understand this song without knowing the allusion, so this is the story :D hehe.  

Story of A Green Frog  (Korean Folktale)- shortened version of this

Long ago, the green frog lived with his widowed mother in a small pond. The green frog never listened to his mother; he always did the opposite of what she asked. If his mother told him to play in the hills, he went to the river. If she told him to go up, he went down. 

The mother frog tried to teach him the proper way to behave, but he continued to ignore her and did as he wished. The mother frog was growing old, and she worried so much that eventually she became sick. But even then the green frog did not change his ways.

When the mother frog knew she was going to die, she called her son to her side. She wanted a proper burial in the mountain. Since she knew that the green frog would do the opposite of what she told him, she said: “I don’t have much longer to live. When I die, do not to bury me on the mountainside. You must bury me on the bank of the river.”

Four days later, the mother frog died and the green frog was terribly sad. He blamed himself for her death and he was sorry for all the heartache he had caused her. He knew it was too late to undo all of his past misdeeds, but he could become a good frog for her now. He resolved finally to listen to his mother’s instructions. “I always did the opposite of what she told me when she was alive,” he said to himself, “but now I will do exactly as she told me.”

So, even knowing that it was unwise, the green frog buried his mother by the river. And when it rained, he stood watch, praying to heaven that the water would not rise. But when the monsoon rains came that summer, the river rose higher and higher—it flowed over its banks and washed his mother’s grave away.

The green frog sat in the pouring rain by the river bank, crying and crying for his mother. And that is why, to this day, the green frogs cry when it rains.

—
And because of this story, the common way to call a misbehaving child is “green frog.” 
GD’s rap alludes to a children’s song, which isn’t related to the above tale.