On the morning of August 18, a teaser image of member Andy was released on the official SNS of Seven O'Clock. In the released image, Andy showed off his unique fashion sense with a stylish visual, colorful pattern of black see-through shirts and accessories. Andy caught the attention of fans both at home and abroad with his calm and moody appearance of a man.

Andy, the third member to be unveiled after Taeyoung and Hankyeom, is a Hong Kong native who speaks five languages, including standard Chinese and Cantonese, and is a sub-vocalist within the team.