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According to the two artists' agency,�Polaris Entertainment, "Deep Inside" is an urban R&B genre depicting the back and forth between two lovers getting to know each other more and more. In addition to "Deep Inside", Han Hee Jun's comeback single album of the same name will also include "2:30 AM" and "Daydream".�

Han Hee Jun also garnered attention for his upcoming comeback by losing 10kgs (~ 22lbs). His comeback single album drops January 4 at 12 PM KST.