South Korean boy band TopSecret released its second individual teaser images on Saturday ahead of its scheduled comeback.

The seven members -- K, Yohan, Ain, Wooyeong, Junghoon, Yonghyeon and Kyeongha -- are seen wearing school uniforms in Christmas colors of red, green and white, with bow ties. All members dyed their hair pink, brown, blonde and red. Their concept is called “TopSecret school look.”

The group’s mini album titled “Wake Up” is themed on a second love that comes to the band. Members Wooyeong, Junghoon and Kyeongha participated in writing the lyrics. K, Yohan, and Ain are former members of NOM, and the group released its first mini album “Times Up” last year. Its agency is JSL Company.

TopSecret will host a fan meeting Friday in Seoul.

By Joel Lee (joel@heraldcorp.com)