常見問題：
問：1. Q: What is Secret? 答： A: Secret is a South Korean girl group formed by TS Entertainment in 2009.
問：9. Q: What is the reason behind Song Ji-eun's departure from Secret? 答： A: Song Ji-eun left Secret in 2014 to focus on her solo career and acting.
問：Q5: What is the significance of the song "Road" by the Korean boy band "GOD"? 答：A5: The song "Road" by the Korean boy band "GOD" is significant as it marked their successful comeback in 2005 after a three-year hiatus.