BTOB‘s Lee Changsub, Apink‘s Park Chorong, and HIGHTLIGHT‘s Son Dongwoon candidly revealed the harsh trainee culture they experienced during their former agency days. Recently, a video titled Showing Current K-Pop How It’s Done was released on Changsub’s YouTube channel. At the beginning, the production team surprised Changsub by saying, “Didn’t you used to work at…
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