Nineteen months. It has been nineteen months since Rainbow released "Rainbow Syndrome Part 2" and since then all we've had was the debut of sub-unit Rainbow Blaxx, who despite a solid mini album failed to compete with Girl's Day, AOA, or even Dal Shabet. After being overtaken even by rookie groups such as Red Velvet and MAMAMOO, it seemed all hope for Rainbow was long gone, and they'd be left to hang around the "borderline" tier forever. After a painfully long wait they've finally returned, but a lot of people have been sorely disappointed, and I'm not surprised, because "Black Swan" truly is a peculiar song, and I've had to rewrite this review twice because of it.
