Petenshi — http://www.pixiv.net/member.php?id=4894

Also known as Dr. VERMILION

Touhou Bloomers Touhou Project Doujin released Mar 2 '08 Chibi Comedy Sports

Akizakura Touhou Project Doujin released Oct 9 '09 Yuyuko x Youmu

(Unknown) Touhou Project Doujin released Dec 7 '09 Comedy Yuyuko x Youmu

Wazuka na Omocha no Gensoukyou Touhou Project Doujin released Apr 28 '10 Aya x Yuyuko Big breasts Comedy Lots of sex Masturbation NSFW Toys Yuri

Youmu's Secret! Touhou Project Doujin released Mar 30 '12 Big breasts Ghost sex Lots of sex Lots of tentacles Masturbation Meiling x Sakuya NSFW Selfcest Supernatural Watersports Yuyuko x Youmu

Pleasure Expert (Heaven Master) Saten-san A Certain Scientific Railgun Doujin released Sep 6 '13 Kuroko x Saten Kuroko x Uiharu Lots of sex NSFW Saten x Uiharu Squirting dildo Threesome Toys Yuri

Happy Birthday Kotonoha Sisters Voiceroid Doujin released May 1 '16 Akane x Aoi Full color Incest Yuri