I don't know the name of the manga, but I'm sure the autor is Itsuki Kaname , I'm really sorry that i can't do more for you. :C
i don't know the manga but, the artist is Itsuki Kaname (maybe)
I thought it was this one too but the uke and seme are a bit different...But it could be .
It's Artbook Illustration from Hyakka Souen
http://www.mangago.me/read-manga/hyakka_souen/bt/31064/Vol1_Ch2/2/
It's not manga. Itsuki Kaname also illustrated ton of novel so it's hard to tell exactly details.
Does anyone know what manga this guys are from?
http://www.mangago.me/read-manga/shihaisuru_yubisaki/mf/v01/c003/35/