This doujinshi seems to be made by circle わくわく動物園 (Wakuwaku Doubutsuen) by 天王寺きつね (Tennouji Kitsune), but the pen name of its main artist is 玉置ひろし (Tamaki Hiroshi).
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I wonder he once acted with this alias. Shining Force launched in 1992, his pen name in commercial issues would be 天王寺動物園 (Tennouji Doubutsuen) in early 90's.
Although he is well known manga artist, since it was made in mid 90's, I couldn't find any information about it.