resinya! D.C. Da Capo Shirakawa Kotori Black Bikini 1/6 PVC Figure
D.C. ～ダ・カーポ～ 白河ことり 黒ビキニVer. 1/6 PVC フィギュア
Release Date: October 2007

The first PVC product from anime fashion manufacturer Cospa under the "resinya!" brand: the lovely Shirakawa Kotori in black bikini!
 
Note:
There is also a limited edition (white bikini).