kazumi_yoshiyuki
Artist. "Matsumoto Drill Lab" is both the artist's penname for mainstream publications and also his doujin circle name.
* Homepage: http://doriken2.blog130.fc2.com/
* Pixiv account: http://www.pixiv.net/member.php?id=8690
* Homepage (old): http://doriken.h.fc2.com/top.htm
* Homepage (old): http://chiba.cool.ne.jp/doriken/top.htm