Talk:Mikami-Sensei/@comment-24611904-20140730222459/@comment-6052796-20140731003150

There are other clues too. Such as one subtle one in the anime. When Kouichi is talking to Reiko during her hangover "I can't stand that damn bird." The next scene shows Yuuya asking Kouichi if Mikami looks sick. While they never showed her during that scene I can guess that she's probably still hungover.