Title: [Nyuu Koubou (Nyuu)] Oidemase!! Jiyuu Fuuzoku Gensoukyou Nihaku Mikka no Tabi – Kisaragi (Touhou Project)
JPN Title: [にゅう工房 (にゅう)] おいでませ!!自由風俗幻想郷2泊3日の旅 如月 (東方Project)
Commissioned by Cemex.
I still remember when this artist first started out on Pixiv and it’s nice to see he has started churning out proper doujinshi.
You can view it here