Idol group Super Junior’s Sungmin appears as your brother in the drama. 
 ”I thought there was a big age difference between us, but we are the same age.  I was surprised.  Super Junior is the best among idol groups and I was surprised again, because he was really modest.  When Super Junior’s fans send coffees to the filming set, Sungmin gives them out to the sunbaenims himself.  Watching that, I thought I should follow his example.”    
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