Siren X.

A crew decides to shoot the spoof ghost sighting documentary Mini-Skirt Adventures by a secluded lake outside of Tokyo, where young men have been rumored to disappear without a trace for several years. As a storm hits, the crew seek refuge at an apparent abandoned mansion, only to discover there is one sole inhabitant, the beautiful and mysterious Reika. She offers them shelter for the night. But soon, the film crew find themselves at the mercy from Reika's dark, dangerous secret.