The cast of KBS web drama 'Sound of Heart' are keeping their promise!

At the press conference for the new web drama on November 3, the main actors, Lee Kwang Soo, Jung So Min, Kim Dae Myung, Kim Byung Ok, and Kim Mi Kyung, promised to hold a fan sign event if the first episode surpasses 1 million views on Naver. 

The first episode of 'Sound of Heart' released online did indeed pass 1 million views in less than 10 hours. As a result, the cast is holding a special fan sign event. 

A rep of the web drama announced, "On December 2 at 2 p.m., a fan sign event will take place at KBS Wedding Hall. Submission for attendance is available on the official website starting today."

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

'Sound of Heart' is currently broadcasting on Naver and will be airing on KBS in December.