Taemin, from the famous boy group SHINEE, had been friends with RiRin, from a newly debuted girl group STORM. They had been friends for a few years when both were trainees from SM Entertainment, however, RiRin felt best that she wasn’t fit for SM Entertainment after 2 years of training and had decided to be under the same company as CN Blue. Amidst, the changing of the companies, RiRin and Taemin maintained a strong friendship.