As mentioned previously, the girls teamed up with producing team�Sweetune�(Han Jae Ho�&�Kim Seung Soo), whom they previously worked with for "Russian Roulette", for the upcoming song, which sounds like it'll be a sad one!

"Ghost" is a song about yearning for a past love that cannot be easily erased from one's memories and heart like a lingering 'ghost', and the digital single will be released on November 5 at noon KST!

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