On May 21st, it was abruptly announced by F.CUZ's agency, Can Entertainment, that member LeeU (Lee Seung Hyun) has been officially withdrawn from the group. Down below is the official announcement from Can Entertainment.

Hello, this is Can Entertainment. We're always thankful for the love and support from fans of F.CUZ, and we sincerely apologize for having to break such bad news to our fans. The reason why we are posting this is to inform everyone that F.CUZ's LeeU (Lee Seung Hyun) has been withdrawn from the group. F.CUZ was a unit team that was formed between three members of UNION CAN - Kim Jin Chul (Jinon), Choi Young Hak (Kan), Kim Ye Jun - and a fourth member, Lee Seun Hyun, from Castle J Enterprise. These members went through pain and happiness together as trainees, and finally debuted on February 8th of 2010 under F.CUZ. Not only has F.CUZ been promoting in Korea, but they have travelling back and forth to promote in overseas countries such as Japan and Taiwan. They were always thankful for their fans, and also put in their best of efforts to show a good image. However, this year, many different opinions were spoken out due to the differences in the direction of the group's music, compounded with Lee Seung Hyun's strong hopes into promoting as a solo artist. Consequently, it was decided for the member to be withdrawn from the group. Agency representatives had been searching in the dark for the possibility of promoting as a four-membered unit group; however, a proper scheme was failed to be found. At the end of many careful deliberations, it was decided for Lee Seung Hyun to withdraw from the group. As a way to respect his intentions, our agency representatives decided to announce his official withdrawal. We would like to give out gratitude and apologies to all the fans who have loved and supported F.CUZ. Please keep supporting the future activities of Lee Seung Hyun and a new F.CUZ. Once again, we would like to apologize for having to announce this news, and we will work harder to become a more developed Can Entertainment.