Kim Hyun Joong recruited the best of the best for his long awaited return. Renowned choreographer Lyle Beniga whipped up his dancing magic for "Unbreakable" and Keone Madrid choreographed title track, "Your Story". Jo Soo Hyun, the director behind the music videos for Psy, participated in the music video for "Your Story", while director Hong Won Ki participated in the music video for "Unbreakable". 

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As mentioned previously, Dok2 featured in the R&B-style title track, "Your Story", while Jay Park added his attractive voice color to the track, "Unbreakable".