Brian of Fly to the Sky revealed an anecdote about Kim Heechul from the past on his YouTube channel.

Brian reminisced about his trainee days at SM Entertainment with Eunhyuk and Donghae, who appeared as guests on his YouTube channel. He mentioned the former team name of Kim Heechul during their trainee period, saying, "I remember Dream Team," to which Eunhyuk explained, "The former team name of TVXQ was Dream Team."

At this moment, Brian said, "I really disliked Heechul during the Dream Team trainee days. I like him now, but there was a reason I disliked him back then." He explained the situation, saying, "When I was walking in Cheongdam-dong, I recognized Kim Heechul first and greeted him, but he just said, 'Ah, yes,' and passed by." He added, "I didn't know Heechul had poor eyesight."

Brian also shared that he confided this incident to Hwanhee at the dorm. He said, "The rookies don't greet. I also felt strange," and mentioned that he told the same story to the manager.

Eunhyuk joked, "At some point, there was a greeting etiquette class for trainees. Didn't it start because you talked about it, hyung?" Brian laughed and said that he likes Kim Heechul now.