Byleth: The Demon of Incest (1972)

A young man finds himself entranced by Byleth, the demon associated with incest, which spirals into a disturbing obsession with his sister. As his fixation deepens, it disrupts their family dynamics and blurs the lines between love and madness. The sinister influence of Byleth pushes him toward dangerous desires, challenging societal norms and provoking a chilling exploration of forbidden emotions. This unsettling tale delves into the darker corners of human obsession and the consequences that arise when boundaries are crossed.