For those who have watched Anohana: The Flower We Saw That Day, you might remember that Menma and the crew played a game of hide-and-seek in the show. It was such an emotional scene, I would not blame if any fan would want to seek Menma out at any chance they get. A Twitter user spotted a Menma cosplayer at the last place you would want to find her, or him (ahem) at summer Comiket.
Come on, Yukiatsu!! Stop running around in that dress already!