I think it seems like miike romuco's art but for now that's all I found...
Like for example in this picture I can see similarity in the art https://www.mangaupdates.com/series.html?id=77107
No sorry it was because I saw the name of this mangaka on the cover 三池ろむこ but actually after searching I came across this title: Iki mo Tomaruhodo, but I don't know if it's a manga http://www.cdjapan.co.jp/product/NEOBK-1499957
A few days ago Elihinata asked for identification of a picture and I pretty much want to know too. My gut feeling says that's it's just an illustration but it would actually be cool if it turned out to be a manga.
I did some futile search and it said that the poster was done by Kasai Ayumi but it really doesn't look a tid bit like her art.
So I was hoping if someone can help. (After all some rare gems here can actually read Japanese)
Here's the original topic
http://www.mangago.me/home/mangatopic/1197032/
And here's the picture
http://www.mangago.me/read-manga/crimson_spell/mh/v06/c041/1/
Thank you