training course introduction: https://yihuode.io/activities/539
music credit:
1. T-ARA[티아라] NUMBER NINE [넘버나인]
2. SISTAR(씨스타) - Give It To Me
3. 씨스타(SISTAR) - (Alone)
4. Secret(시크릿) _ Love is MOVE
5. SISTAR19 씨스타19 - 있다 없으니까(GONE NOT AROUND ANY LONGER)
6. Trouble Maker