http://www.mangago.me/read-manga/aishuu/an/aishuu-chapter-2.html/5/
I've seen comments about this before saying it's just pretty concept cover art and not from a real story. That breaks my heart. I would read the hell out of that.
lol i got frustrated looking if it had a real series but i am positive that unique style is by suzuki tsuta
http://www.mangago.me/read-manga/aishuu/an/aishuu-chapter-2.html/5/