KBS 2TV's upcoming drama titled Cinderella's Sister is set to premiere on the 31st. With its official poster revealed, viewers are anticipating the drama due to the promising main cast members composed of Moon Geun Young, Chun Jung Myung, Seo Woo and Taecyeon of 2PM. Well, fans have got more to be excited for, as it has been confirmed that Super Junior's Yesung will participate in Cinderella's Sister's OST (soundtrack)! Furthermore, it's expected that another famous idol group will participate. Stay tuned to the drama's OST as well as its premiere on the 31st!