Responses
It was drawn by the author.
It was drawn by Yoneda Kou. You'll find excellent analysis of this picture here: http://rlttc.tumblr.com/post/80383541828/saezuru-analysis-ihr-hertz-may-issue-cover-the
That was fast! Thank You! :)
Thank you so much for this link! What a treasure!
Another question from me!
While browsing around I found a picture where you see a young Yashiro, with a sling on, inside some office with Misumi and another man. Outside the window there is a super young (like an 11 YO) Doumeki walking by. Was it drawn by Yoneda Kou or is it fan art?
I'm sorry, I can't figure it out on my own. Thank you for your help!