A 2 chapters prologue of Another (http://www.batoto.net/comic/_/another-r591) about the story of Mikami Reiko in her highschool day.

26 years ago, in a third-year classroom of a middle school, there was a student named Misaki. As an honors student who was also good at sports, the charming girl was popular with her classmates. When she suddenly died, her classmates decided to carry on as if she was still alive until graduation. Then, in the spring of 1998, a boy named Kouichi Sakakibara transfers to that classroom, and he grows suspicious of the fearful atmosphere in that classroom. In particular, there is a beautiful, aloof girl named Misaki Mei who wears an eyepatch and is always alone drawing pictures.

Students from a university mystery club decide to visit an island which was the site of a grisly multiple murder the year before. Predictably, they get picked off one by one by an unseen murderer. Is there a madman on the loose? What connection is there to the earlier murders? The answer is a bombshell revelation which few readers will see coming.