Rainbow BLAXX made guest appearances on Mnet's 'Beatles Code 3D' on February 4 for the '19+ Rating' special and answered some questions.

One question was, "Currently, the victor in the January 2014 girl group sexy concept is Girl's Day. However, do Rainbow BLAXX think they can beat Girl's Day?"

Without hesitation, Woori said, "Yes." Mir asked, "Which team of the two do you think the public finds sexier?" The members said, "We are sexier. First off, our average age is higher than theirs." Rainbow BLAXX's average age is 26, while Girl's Day is much younger at 23.

Jaekyung said, "We even told the agency with self-confidence, 'We have the confidence not to lose in sexiness,'" and Woori added, "As long as we're doing it, might as well do it with confidence."

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Shindong also asked the girls, "Do the members talk a lot about 19+ (mature) things?" Jaekyung said, "Of course," while the members said, "Hyunyoung knows a lot about erotic videos," which Hyunyoung denied.