The idol star is trying out acting for the first time as the neighbor of Lee Kwang Soo, who plays the main character, Jo Suk. �According to the producers, Kim Se Jung expressed a bit of confusion at first, but quickly adapted to the drama set and perfected her bright and cute cameo role.

SEE ALSO: Lee Kwang Soo returns to SBS entertainment program for the first time in two years

'Sound of Heart' will be shown on Naver's TV Cast on November 7 and broadcast on KBS in December.�