I made a post in 2014 that was never resolved. Re-posting that plus more relevant bits:
First-ever post like this. I'm looking for something.
Details: It's definitely a doujinshi. I don't really know what of. The only thing I remember is that in the afterword the artist says something like, "Have you seen Tari Tari? If not, please, give it a try!" and includes a sketch of the Tari Tari girls, probably Sawa and Konatsu. It's also by a well-known yuri artist, I think.
In advance, thank you.
And it's almost definitely tagged with yuri.
Bonus hint: It was almost definitely posted to the site - and most likely translated - within the last year.
Super secret bonus hint: It probably wasn't Nanoha.
Another hint: It was definitely released before September 20th, this year. (I know these are probably just for me, but whatever, I'm determined now!)
Stupidly obvious edit: the doujin was most likely released in 2012, probably at C82.
Cyfer says, "Editor-san thinks it was probably a Touhou doujin."
(Restating for 2019: Please and thank you.)