Yoo Seung Woo collaborates with Yoo Yeon Jung for the new Vintage Box special. The song is entitled, “I Will Be On Your Side” and the two sound fantastic together. 1theK states, The cooperation project of Starship Entertainment and Indie Music, the 2nd ‘VINTAGE’ box is being released. The song that will be remade by VINTAGE BOX project is ‘I’ll…