말할수없는비밀OST    5. Dou Qin (斗琴) (두금 ; 피아노 배틀)      Chopin Etude op.10-5 'Black Key' 를 백건으로,  Chopin Waltz 7번 C# 단조 Op.64-2 편곡,  Nicolai Rimsky-Korsakov: The Flight of the Bumble-Bee 편곡.    

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