50926-rainbow-second-teaser-image The title pretty much says it all on this one. This morning, girl group RAINBOW, keeping the pace on their much buzzed about comeback, released the second teaser image—and this time, they're wearing shirts. The ladies, keeping it cas(ual) in blue jeans and white cut-off sweaters, are seen holding up placards that spell out, well, RAINBOW. The image was released in preparation for comeback showcase which will launch on the 13th of the month. We can't wait! Are these images getting you pumped for their comeback?