Circle:  Yukin Co.  (Kiriga Yuki)

Title:  Royal Couple

Pages:  38

Rating:  PG-13

Description:  Yuuri/Wolfram. Cute, non-explicit doujinshi. Pretty good art.

Circle:  1-3 and Par Deux

Title:  Hana Choko

Pages:  32

Rating:  R

Description:  Yuuri/Wolfram, Wolfram/Yuuri, Conrad/Wolfram, Conrad/Yuuri
This is a Wolfram fan book which means that Wolfram is paired with absolutely everyone.  Okay, really only with Yuuri and Conrad.  It has some nice color pages in the beginning and is extremely cute.  There are 3 pages of novel in the middle.

Circle:  1-3 and Par Deux

Title:  Wolfram Honey Anthology

Pages:  112

Rating:  NC-17

Description:  Yuuri/Wolfram, Conrad/Wolfram, Gwendal/Wolfram,
Muraken/Wolfram, some people I don't recongnize/Wolfram, Gwendal/Wolfram/Conrad 
This one really is Wolfram and everybody else.  The art varies greatly
from chapter to chapter, but overall the stories are pretty cute. Plus
there are some nice Yuuri/Wolfram sex scenes.