AFTERSCHOOL is releasing singles divided into two teams, RED and BLUE! The BLUE team members, selected by fan club, staff, and the members themselves, are Juyeon, Raina, Lizzy, and E-Young. With a "summer" concept, they deliver a refreshing breeze with "Wonder Boy," a cute love song penned by the popular composer Cho Young-soo! ★ This is a Korean version for sale. Playback confirmed. ★ Please consider purchasing with the understanding that this is a used, personally stored item. Those who are concerned about minor details should refrain from purchasing.