Responses
The artist is Machiko Madoka, the mangaka for this one
http://www.mangago.zone/read-manga/tenki_yohou_no_koibito/
I think this one is just a pinup illustration.
beta
I usually don't ask questions here, but I'd like to know the name of the manga featured on the cover: http://www.mangago.zone/read-manga/haikei_niisan_sama/tr/133938/page/2/
If you know what it is, I'll be eternally grateful to you! (also if it hasn't been scanalated that's okay, it'd just be nice to know the name)