山下智久
was a special temporary unit formed by KAT-TUN member Kazuya Kamenashi and NEWS member Tomohisa Yamashita for their 2005 drama "Nobuta o Produce". and are the names of the characters Kamenashi and Yamashita play in the drama respectively. Although the drama has long finished on television, the duo have revived their performance of their song numerous times. In 2017, they formed another special temporary unit, , for their 2017 drama "Boku, Unmei no Hito desu."