In 2004 and 2005, there was a rumor that they would break up. Brian denied to rumours and said that Fly to the Sky was not disbanding. He said the two had hard time getting along for first few years of their career on the show "Yah Shim Man Man," which aired on July 10. He said that he felt envy towards Fany, because he received more attention and praise than him. Brian felt that he was not given his due as Fany. Eventually he found this difficult to bear, and suggested to Fany that they pursue their separate paths. Fany responded angrily and the led to a fight that nearly led to the duo breaking up. The two was on good terms again soon after, understanding each other better. After the fight, the two decided to try to better understand each other in order to solve their problems together and to support each other. Brian's eyes were filled with tears when he was talking about the rumour.