Why does the bird in the birdcage sing?

Why is his voice as beautiful as the colors on his back?

His beauty shall not last, for with each note and

each intake of breath, the time still goes on

His efforts will be in vain

Nobody will stop to free him from his cage

And he shall live a sad, sad life,

continuing to sing as time goes on,

keeping his smile as bright as his hopes

to be able to stretch his wings and fly

Poor Chanyeol never had a chance in this cruel world