One of a Kind is the second solo release of South Korean singer-songwriter and rapper G-Dragon, leader of Big Bang. The mini-album was released on September 15 digitally and on September 18 physically. On August 25, G-Dragon released the first music video of the song One of a Kind. However the song was not released as a single as the song and music video served as a way to introduce the album and concept to the public. On September 1, G-Dragon released his first single "That XX". The song topped music charts immediately after release and eventually achieved "perfect all-kill" status. The song Crayon will serve as the lead single of the album, which contains a total of seven songs all co-composed and written by G-Dragon himself.
Upon release, the album was an immediate success in South Korea. All of the tracks occupied the top positions on all major music charts, earning G-Dragon another Perfect All-Kill. The EP also places first on the Billboard World Album Chart and entered the Billboard 200 Chart at 161 for the week. As of January 2014, the album has sold over 252,728 copies, making it the highest selling solo album in Korea since the release of Heartbreaker in 2009, also by G-Dragon.