13:05 12/3/2022 A girl group member who became a member even before our debut 0 (0) The new member of girl group Triple S is Seo Dahyun lolIt was leaked because I sang the OST How useful was this post? Click on a star to rate it! Submit Rating Average rating 0 / 5. Vote count: 0 No votes so far! Be the first to rate this post.