問：2. Q: How many members are there in Secret?
答： A: Secret originally had five members, but now consists of only four members after Song Ji-eun's departure.
問：4. Q: What was Secret's debut song?
答： A: Secret's debut song was "I Want You Back," released in 2009.
問：7. Q: Has Secret released any albums?
答： A: Yes, Secret has released several albums, including "Moving in Secret," "Secret Time of the Day," and "Letter from Secret."
