Kitty GYM is a temporary unit that was composed in 2006. They were formed to promote the Women's Volleyball World Grand Prix, an event that began August 18 and ended on September 10, 2006.

The name comes from the first initial of their last name, or in the Thai duos case, their pseudonyms.

They released their only single on August 30, 2006, entitled Fever to Future. This single included a solo from Tomohisa Yamashita and a duet by Golf & Mike. The single ended up selling 299,996 copies, making it the 25th best-selling single of the year.