I can't recognise ponytail there Considering the pink hair and Saito..well Louise? Edit @Red Piotrus I am still waiting for a Young Karin doujin Because man she sure had some legs
@laefielx: Looks too adult to be Louise, unless it some "body change/older" plotline. I thought it was a badly drawn princess Henrietta. Perhaps somebody can read the kanji and see if there is some name reference...