The song is actually almost two years old and the second part to the boys' ballad trilogy. The original MV was 8 minutes long (you can find it here). However, during Cube TV on September 21, Cube Entertainment dropped the 10-minute full version of the MV.
The full version of the MV caught Melody by surprise as they hadn't expected the MV drop at all. It includes a little more on the Ilhoon-Changsub-Hyunsik trio's story and also has bits of the song "All Wolves Except Me".
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Check out the full 10 minute MV to the song above.