AI girls gain emotions as "color", and try to become a human being. As they gain various emotions, their R, G and B status change. The girls' aim is to make all those three status 255, which is a color called "white". To be the "White Girl" is the goal for players, and it also is the goal of world view.
By gaining cards called "piece of memory", you can update your girls and/or attack opponents' girls. As the girls get updated, their bodies gain various colors. The colors are expressed in three values, which are "R", "G" and "B". The values themselves become the girl's status and her appearance.