This game was released for the Sega Saturn but the field was left empty. Here's a lovely
GameFAQs entry. Also they list these games in the Japanese name over there (Ginga Ojousama Densetsu) but I think that on many covers under the Japanese characters 銀河お嬢様伝説 you can see the text GALAXY FRAULEIN so I think it's an official translation (and "Yuna" is written in kana ユナ and thus should be translated).