Kitty GYM was a temporary Japanese idol unit formed in 2006 to promote the 2006 FIVB Volleyball World Grand Prix.
On July 18, 2006, GYM (Golf, Yamashita, and Mike) held an event at the NHK Hall and performed "Fever to Future" for the first time.
[2] "Fever to Future" was used as the image song for Fuji Television's broadcast of the 2006 FIVB Volleyball World Grand Prix.
[3] They made their first appearance as a 7-member unit on August 19, 2006, at the Ariake Coliseum, where they performed "Fever to Future" to a crowd of 10,000 fans.
[14] "Fever to Future" was written by A to Z, H.U.B., and Shin Tanimoto, and arranged by Naoya Kurosawa and Shunsuke Yabuki.