I forgot about this picture from Comiket, since I wasn't sure who she was at first, but I finally confirmed that this is from He Is My Master, Karauchi Anna!
Anna is actually bisexual and has a crush on Izumi. At first, she is attracted to Yoshitaka, but after Izumi's relentless efforts to make her stay away from Toshitaka, Anna mistook this as a sign of interest. She thus became one of Yoshitaka's maids in order to follow Izumi.
I guess it could be considered an honest mistake? Haha, thanks to Ojii-san for sending this!Technorati tags: cosplay, cosplayer, holic, role, play, roleplay, costume, anime, manga, he, is, my, master, karauchi, anna, comiket, 2009, bisexual, sawatari, izumi, yoshitaka, nakabayashi, relentless, effort, stay, away, sign, interest, maid, follow, honest, mistake, ojii-san, コスプレ, コスプレイ, これが私の御主人様, 倉内, 安奈, 沢渡, いずみ, 中林, 義貴