Great job with the song at the end! Heechul should really be more confident with his singing. Yesung is indeed a great vocalist, but Heechul's part had the same melody (as Yesung's) and his voice was just as powerful and on point.
here is the first part subbed /watch?v=vOL5SV5bAXk the second /watch?v=GbjIP74tzUg the third /watch?v=pGiIoODR1PQ and the fourth /watch?v=D8bEE5RlmtQ enjoy :D