*[ZWEI II ツヴァイ2 限定特典版|http://www.amazon.co.jp/exec/obidos/ASIN/B001BYEY4W/xfuweb-22/ref=nosim/]
*[Zwei!! XP DVD-ROM版|http://www.amazon.co.jp/exec/obidos/ASIN/B000093R7A/xfuweb-22/ref=nosim/]