Dokuro: Act 2 DVD
There really isn’t a good description of this one anywhere online. Basically a soft JAV about a school preparing for a play, Romeo & Juliet to be exact. But as goes most American slashers, some pissed off dude in a mask starts knocking off the highschool girls. This is actually pretty gory and makes for a good Japanese horror film.
Except add 'Act 2' at the end of all of that.