KAT-TUN brings the 26th single. The title song is the main theme song for the TV drama series "Kaito Yamaneko" in which Kazuya Kamenashi stars. This edition includes "Unlock" and "GREATEST JOURNEY" and comes with a bonus DVD with a music video for "GREATEST JOURNEY" and making-of. Also comes with a "KAT-TUN photo name card" randomly selected from 15 kinds. *Visual contents on cover artwork corresponding to all the editions are different from each other.