Yoo Sung Eun isn't just making a comeback!  She's returning with the help of someone from 'Unpretty Rapstar'!

And that person is none other than... Kisum!  The talented singer, Yoo Sung Eun, dropped a teaser image that showed that the first one was only half of the larger picture. Opposite her is Kisum sitting in inverted colors of blue and pink.

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