THE LITERAL MEANING OF 'MIDNIGHT SUN'

According to Encarta (2009), Midnight Sun is sun visible at midnight at pole. It means the sun when it is visible from within the arctic or antarctic circles at midnight during their respective summer months. 

Other meaning, here:

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BEAST'S 5TH MINI ALBUM: "MIDNIGHT SUN"

cr: playb2st

BEAST will comeback at 2012/07/22. Yesterday on Hangout session with BEAST in their Google+ page Dujun announced that they will make their comeback on July 22nd through Inkigayo. And now, the news dropped out that their album gonna be named "Midnight Sun". Thus they will release 6 songs on the same day.

cr: enewsworld

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-- I CAN'T BREATH, BEAST KEEP CHASING ME --

source: enewsworld, allkpop