Vectors: ハルヒ, ハルヒ (18+) Wallpapers: ハルヒ, ハルヒ (18+) Special: ハルヒ (18+)
I based this on the image with all the girls on the beach blanket, using a scan from the doujinshi TimTim Machine 16. The Special file is actually a render of 4 different costumes she wears.
