http://www.mangago.me/read-manga/tokyo_shinjuu/mf/v01/c001/
Dont know the title but judging by the art,it looks like Itsuki Kaname sensei's art. You could try looking up for the author's work.
Hey, if no one gives the name of the manga, it's most probably because it's not a manga. The image is from dpscans, and based on their faq, it could be a postcard scan, novel illlustrations or wallpapers.
http://www.mangago.me/read-manga/tokyo_shinjuu/mf/v01/c001/