At the beginning of the game, the player may customize the girl's different attributes, such as her hair color, hair style, breast size, skin color, and blood type (this has the added function of selecting her personality, based on the popular Japanese pseudoscience). Unless third-party modifications are used, the girl will still more or less look the same underneath the hair and minor modifications, a problem foreseen by most gamers to plague many other games of this genre that attempt this type of customization. This (along with other concerns, see below) has led to a lot of the aforementioned "modding" to this game, both inside and outside of Japan.