1. Only one active picture at a time.2. If nobody can produce an correct answer after 24 hours or after 3 guesses, a hint of some kind must be posted3. Whoever guesses the pic gets to post the next pic, unless they pass it off.4. If you're guessing, wait for confirmation that you're right. If you know you have the pic dead to rights, you may post your own stumper right away.
1. If no-one guesses the picture, try to add more thing to it (e.g. if you cropped the picture to show only the delightful posterior, show some of the legs as well, and maybe also some background of the shot)2. After the picture has been guessed, maybe editing your post and putting the full picture3. After guessing (right or wrong) try to make a comment about the pic (e.g. WHAT A DELIGHTFUL POSTERIOR !)4. If you are sure about who it is, you may try also guessing from where it was taken, be it a photobook, Alo-Hello, etc.
Those legs could only be Kaori's.