After a long hiatus, the After School girls are back on MBC's Music Core with a brand new round of promotions after releasing their first album, "Virgin" earlier this week. Decked out with a lovelier and more feminine concept, the girls have filled the album to the brim with songs that hold motivating themes like confidence and individuality. It's been a long year since their last "Bang!" release, so the girls have set out to make this comeback particularly special. Their title track, "Shampoo", was written by poet Won Tae Yeon (of Secret Garden's "That Man") and composed by Japanese producer, Daishi Dance. With a subtle piano melody and an emphasis on the emotions behind the lyrics, the song seamlessly weaves in and out of After School's beautiful vocals and powerful rapping. Check out their comeback stage, which also includes "Let's Step Up"!