Kotoshima Motoki — http://www.pixiv.net/member.php?id=46587

Amaranth by GP-KIDS and Kotoshima Motoki Touhou Project Doujin released Sep 4 '09 Blushing Reimu x Sanae Romance Yuri

A Sweet KogaSana! by Kogawa, Kotoshima Motoki, Omchicken, and Suichuu Hanabi Touhou Project Doujin released Mar 14 '10 Comedy Ecchi Kogasa x Sanae Yuri

Gender and Jealousy Touhou Project Doujin released Apr 12 '12 Comedy