The boys are just chilling around in the dark outside with a heavy camera flash on them, showing off their handsome faces. Each of them seem to be conveying the message of being in deep in thought, perhaps pondering how to 'Grow Up'.

HALO's comeback album will be released on May 28, but before that, the group will perform their title track "While You're Sleeping" ahead of their official comeback at 2015 Dream Concert!

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Take a look at their stylish individual photos right here! Are you excited for their comeback?