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Wu Chun vs. Jiro Wang
Before Wu Chun's breakthrough performance in the Taiwanese drama Hanazakarino Kimitachihe (Hana-Kimi), most fans considered Jiro Wang as the lead singer due to his memorable performances as the supporting actor, Ah Jin, in It Started With a Kiss and the first male lead, Wang Da Dong, in KO One. Jiro was also granted as the male lead in many of Fahrenheit's endorsement ads and commercials. The paparazzi reported that Jiro was starting to feel overshadowed by Wu because Wu was slated as the first male lead in Hana-Kimi while he was bumped down to the second. The media claimed that Jiro was feeling kicked down and he was not getting the fair share of male leading roles as Wu. (Wu was also the male lead for another Taiwanese drama, Tokyo Juliet.) It was rumored that Jiro was planning to leave Fahrenheit so he could attack Wu's popularity and also focus more on his career alone. After the release of Hana-Kimi, it had become a fact that Wu is not popular among the four; Jiro first due to his often exposure to the media on television and newspapers. Since Wu was also getting more movie and endorsement offers than the other three, it was also reported that Wu was planning to leave the group as well so he could focus more on his personal goals. To cause more controversy, the media reported that Jiro and Wu were also fighting to be the "No. 1" of Fahrenheit and were not getting along. But Fahrenheit quickly stepped out and denied the rumours