Artist.

Japanese name: H級遊撃隊 (H-Kyuu Yuugekitai)
Circle & site name: 妄想回路 or モウソウカイロ (Mousou Kairo)

See also

• Blog: http://mousoukairo.seesaa.net/
• Pixiv account: http://www.pixiv.net/member.php?id=2277954