Well there's two on Jan 4 (the time doesn't show for me since i'm not using a mobile), but I'm guessing you mean this one:
https://fbcdn-photos-f-a.akamaihd.net/hphotos-ak-xpa1/v/t1.0-0/10897827_799335910138329_1029065249465172797_n.jpg?oh=22a9ed3de28b8a72e2521e4df089e2d1&oe=5520AB6C&__gda__=1433204692_a4845c2418a1195bbecdb7a350b9a6b1
It's a novel illustration by Ayumi Kasai.
Is it novel? Where could we read it?
https://m.facebook.com/BlAnimeManga
I can't upload a picture so please scroll down to the post on Jan 4 time 8:31. Please help I really love the covers artwork but I have no idea what the manga is and I really want to know.