Most of the shining games have very little art associated from outside Tony Taka's works. Not sure if its because they're not as popular as other JRPGs, people don't want to have their works compared to Tony Taka's or if its something to do with Copyright, but there's very little fan art of anything from Shining force, hearts, tears, resonance, etc.
That being said, this Rinna doujinshi was actually pretty good, especially considering beggars can't be choosers.