I think Momono Moto wrote a continuation to "the ultramarine of that girl" (或る少女の群青 - ultramarine as in the blue lapis lazuli coloring, perhaps referring to feeling blue?), published in the May 2011 issue of Yuri Hime (vol. 24) - a 6-page story called "the summer day of that girl" (或る少女の夏の日) was published in the August 2011 issue of Sayuri-hime (vol. 7).
As to whether someone can get a hold of it, scan it, translate it and publish it, I do not know.
EDIT: Had a bit of help with translations of the titles thanks to a few friends.
last edited at Apr 27, 2014 3:58PM