B1A4 is finally back with their fifth mini-album and their title track, 'Solo Day'!
The song tells the story of a carefree single man who bemoans his 'solo' status. With the cheerful whistling and the upbeat instrumental, the song is a perfect fit for the upcoming summer season!
Check out the music video above!
SEE ALSO: B1A4 celebrates 13th anniversary with sold-out fan concert series
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