Itsuki Kuro http://www.pixiv.net/member.php?id=73663

Also known as Kurocan

Hartmann2.5 XXX on a Rainy Day Strike Witches Doujin released Dec 30 '13 Erica x Gertrud Lots of sex NSFW Yuri
Hartmann 3 Bride Contest! Strike Witches Doujin released Feb 1 '14 Comedy Erica x Gertrud Marriage Yuri
I LOVE Hartmann! Strike Witches Doujin released Aug 15 '15 Comedy Ecchi Erica x Everyone Erica x Gertrud Erica x Krupinski Erica x Marseille Yuri
Hartmann 4 - Erica's Shocking Pregnancy! Strike Witches Doujin released Aug 15 '15 Comedy Erica x Gertrud Erica x Marseille Yuri