"Promise U" (새끼손가락) is the fifth digital single by Apink. It was released on April 19, 2015 as special gift for their fans for celebrating fourth year anniversary of their debut. The song appears on the album Pink Memory.

Track list

  1. "Promise U (새끼손가락)" - 3:44
  2. "Promise U (새끼손가락) (Inst.)" - 3:44


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