After a long wait, the After School subunits - After School Red and After School Blue - are ready to bring it on with their respective debut stages on today's episode of MBC's Music Core. After School decided to embark on a little friendly competition by splitting into two subunits, as voted by fans - A.S. RED hosts members Kahi, Jungah, Nana, and UEE, while A.S. BLUE features members Jooyeon, Raina, Lizzy, and E-Young. Through this unique promotion, they hope to show off two different sides to the beauty that is After School. A.S. RED will bring out a sexy, powerful concept, while A.S. BLUE will cater to the summer heat with a sweet and outgoing concept. Check out their debut stages below! -- After School Blue - Wonder Boy - After School Red - In the Night Sky