With the help of Yang Jeong Mo, SoYul of Crayon Pop makes her solo debut with the track “Y-Shirt.” They state, “CrayonPop, a group that had Korea jumping up and down with “Bar Bar Bar”, is back hand in hand with Rainbow Bridge Agency, with a collaboration single “Y-Shirt”. The new digital single “Y-Shirt” is another CrayonPop style, cute &…