School Day of the Dead by Tetsuo Shinohara

5.20

Some students decide to set up a play written by one of their classmates, who has commited suicide. The play is based on a tragic and mysterious legend about a love affair between two teachers at the school long ago. Some girls then accidentally stumble over some information about the legend, and the girl who commited suicide. Shortly after, the girls start turning up dead in seeming accidents.