User blog:Eddieblake/New K-ON Visual Invites Fan Speculation!

From the article: This month's  Animedia magazine has run a  K-On! spread that's raising fan eyebrows. What they noticed is that while  Azusa  is in her school uniform, the other girls are in casual clothes... along the lines of when the manga relaunched in 2011 with one series following the main cast in college and a second featuring high school light music club members Azusa, Ui, and Jun.

Link ( http://www.crunchyroll.com/anime-news/2013/06/08-1/new-k-on-visual-invites-fan-speculation)