noon boys is a Johnny's Jr. unit. This is actually to name the 2 Johnny's Jrs., who appear on the TV show Waratte Iitomo! regulary.
Since October 3, 2011, Sanada Yuma and Nozawa Yuki appear regulary from Monday to Friday on the TV show, Waratte Iitomo!. During this days, the show is airing from 12:00-13:00. And thus, Johnny H. Kitagawa decided to name thieit unit noon boyz.
In this show, which main host is Tamori-san, they mainly act as assistant and get to do a small performance as opening of the show.