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She'll be promoting as an actress under GnG Production. The label stated, "Oh Seung Ah showed off a variety of appealing qualities during her days in Rainbow and promoted in many fields including varieties. We will support her actively in order to amplify her talents."
GnG Production is home to Shim Hyung Tak, Han Go Eun, Dohee, and more.
DSP Media announced Rainbow's official disbandment this past October.