The newest work in the Galaxy Fraulein series featuring the main character, a highschool girl idol and "saviour of light", Galaxy Fraulein Yuna. The system and story is almost the same as the previously released "Yuna 3" on the Sega Saturn, however, there are new modes added for the PS verions called, "Collection Card System" and a v.s. mode that utilizes save data. The basis is adventure but, there is a completely different simple simulation system called "tactical adventure".