Kurohime: Shikkoku no Yakata (Black Widow)

Synopsis

A camping trip takes a turn for the wild when the group discovers a mystery mansion in the woods. Excitement turns to thrills of terror as people begin to disappear. Too late, they realize they are trapped in the clutches of a mysterious woman. Who is that woman and will the group of campers be able to escape the remote mansion? (Source: AniDB)