In the MV teaser, The Boyz members give their best looks to the camera until it's revealed they're students on top of a school roof.

"Boy", the title track of their upcoming debut album 'The First', is composed by Yoon Jong Sung and $un, while Bae Min Soo and The Boyz member Sunwoo wrote the lyrics. The 12-member idol group previously introduced themselves through their reality show 'Flower Boy Snack Shop', and they'll be making an official debut with 'The First' on December 6.

Check out The Boyz' "Boy" MV teaser above!