HaHa�appeared as a guest on the May 31 broadcast of MBC's 'Radio Star', where he admitted he's had thoughts of quitting 'Infinity Challenge.'

HaHa explained, "Apart from quitting as a whole, I thought I wasn't needed on the program anymore. I felt sorry for that. There was a time when I thought, 'Should I just stop here,'" causing alarm in the studio.

He added, "It was after I had returned from social services. At that time, I thought everything would go well if I had things planned ahead. So I decided to watch carefully once Kim Jong Min came back to the show. However, I felt myself stepping back due to my lack of confidence."

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