Actor Yoo Joon Sang compliements Super Junior Sungmin. 

On the 20th on KBS2 "Star Life Theater," member Sungmin was seen at his rehearsal for the musical "Jack, the Reaper."

In this episode the other star of the musical Yoo Joon Sang was seen complimenting Sungmin. "Sungmin's improving really quickly," he said.

Yoo Joon Sang then continued to guide Sungmin step by step through different scenes. He showed a lot of care as he was teaching Sungmin.

Sungmin shared, "Being in a musical's not easy. I have to work hard so I don't fall behind." His words showed lots of passion.

He added, "The seniors help me a lot and teach me lots of tips," and, "Yoo Joon Sang always tries to give me good advice." 

Sungmin became familiar with the musical scene through his first one being three years ago. It was called, "Achilla."