As of writing this review, I've yet to see the other OVA in this series so it may be updated. What you need to know is that this is a great story for any fan of paranormal thriller series, and that despite it's age both the graphics and audio hold up very well, but that's about where it falls off.
A great story with likable characters and a great sense of actual character development despite the shows length, but that's the issue. From what I understand, this was a fairly large manga and the story should not have been adapted into so few episodes. It's so rushed it doesn't really hook the viewer and watching it felt forced at parts, but it's definitely worth it at the end.
When I heard about this I really wanted to give it a higher rating, and I feel that my bias towards the genre and older anime in general might be half of why I'm giving it a 7 so take my rating with a grain of salt.