Idol singer Jung Se Woon presented fans with a special 100-day debut version of "Just U".

The video includes footage of Jung Se Woon dancing in the studio and clutching a microphone as he demonstrates his impressive vocals. "Just U", featuring Sik-K and produced by GroovyRoom, is the title track of Jung Se Woon's debut mini album 'Part.1 Ever' released this past August.

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Happy 100 days to Jung Se Woon! Check out the clip below.