EXID's Hani and VIXX's Ken have joined hands, literally, becoming the cutest couple for their collaborative single!

"One By One" (Korean title: "Gap") describes the feelings of a guy and girl who want to end their 'some' status and move forward to become an official couple. The sweet love song is sure to be one that'll be on your playlist throughout summer

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Without further ado, check it out through the audio clip below!