Black Diamond is a 黒肌ｷﾞｬﾙ (Black Skinned Gyaru) Unit.
And, I'm now a member of this unit in their overseas chapter. I'm happy and proud to carry their banner on my Crooz and this blog. We have a small fb group to support each other and plan on how we will spread the word of Gyaru to everyone. Please wish us luck in spread the word of Gyaru and Kuronba.