The Watcher in the Attic (1976)

When a tenant from a shabby 1920s boarding house secretly witnesses the landlady perform a truly heinous act, he is overcome with desire for her and begins plotting to kill a fellow tenant to demonstrate his love.

Genres: Romance, Thriller, Horror

Stars: Junko Miyashita, Renji Ishibashi, Tokuko Watanabe, Shirō Yumemura, Aoi Nakajima