Share Read on Mobile Enter Reading Mode Yoo Seung Woo and IOI's Yoo Yeon Jung sing sweet duet 'I'll Be on Your Side' for 'Vintage Box' Posted on 2016-11-10 22:54:10 by asianlook Yoo Seung WooandIOI'sYoo Yeon Jungare next inStarship Entertainment's cover project 'Vintage Box'! Comment