well, sometimes I question even the search function on this site, I probably searched every nook and cranny with NSFW (or I think it was moderate amounds of snu snu which probably was a lot shorter) and there is this one doujinshi that had a genuinly realistic character, a blond (?) tailed girl with glasses that worries that her girlfriend want's to break up with her since she is so busy studying for an test.
