Image by Koyama Shigeru

Fairly short doujin by the artist that did ママんげ。

Title: うさぎとの正しい付き合い方, The Correct Way to Socialize with a Rabbit

Artist: Koyama Shigeru

Genre: Romance

Characters: Reisen Udongein Inaba, Konpaku Youmu

Youmu invites Reisen to visit the Hakogyokurou, Yuyuko's shrine / mansion. 

Read it @ Danbooru, or @ Pixiv

Kenn's Comment: Do I have to add yuri / shoujo-ai to the genre list if most touhou doujins are shoujo-ai anyways? Anywho, it's a nice doujin featuring a popular servant couple. Koyama Shigeru's art is great too.