Gengorou

Also known as Youmusya, Youmusha, and Youmusya

Ball-Tail by Gengorou, Narumiya, and Tiriakuta Touhou Project Doujin released Jul 10 '09 Anal Animal ears BDSM Lots of sex NSFW Toys Watersports Yuri Yuyuko x Youmu
Hooked on Wriggle Touhou Project Doujin released Aug 8 '10 Cirno x Wriggle Comedy NSFW Nosebleed Rumia x Wriggle Threesome Yuri
Kami-sama to Issho! Happy Every Day! Touhou Project Doujin released May 17 '11 Exhibitionism Incest Kanako x Sanae Lolicon Lots of sex NSFW Sanae x Suwako Threesome Toys Yuri
K-ON! Anthology Comic ch09: Ui-chan Does Her Best! released Dec 30 '12 4-koma Anime Comedy Music School life Spin-off
Library Lovers Touhou Project Doujin released May 3 '13 Lots of sex Marisa x Patchouli Masturbation NSFW Watersports Yuri
Akuma no Inu no Shitukekata Touhou Project Doujin released Jul 18 '13 Drugs Lolicon Lots of sex NSFW Remilia x Sakuya Toys Watersports Yuri
Summer Night Wild Excitement Touhou Project Doujin released Nov 16 '16 Alice x Marisa Drugs Lots of sex NSFW Reversal Yuri