Boy Next Door's Myung Jae-hyun, who even worked part-time at a coal mine when he was 20.

Boy Next Door's Taesan, Unhak, and Myung Jaehyun appearing on Mini Pinggyego!

While sharing the story of how Jaehyun did a lot of part-time jobs after quitting as a trainee

He shared a story about how he had experience with coal mining, even though he didn't go inside the mine, but he did try carrying it.

It's really amazing that you even did a part-time job like this at the age of twenty.