Byleth: The Demon of Incest_
"A boy is blinded with incestuous passion."
A young man becomes obsessed with Byleth, the demon of incest, and it leads to an unhealthy infatuation with his sister.
Starring
Mark Damon, Claudia Gravy, Aldo Bufi Landi
Updated Feb 16, 2026
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Year context
Byleth: The Demon of Incest was released 54 years ago in 1972.
Overview
A young man becomes obsessed with Byleth, the demon of incest, and it leads to an unhealthy infatuation with his sister.
Byleth: The Demon of Incest is a Drama, Horror film with a runtime of 1h 21m.
CAST (15)
Mark Damon
Duke Lionello Shandwell
Claudia Gravy
Barbara Shandwell
Aldo Bufi Landi
Giordano
Franco Jamonte
The Judge
Alessandro Perrella
Magistrate
Fernando Cerulli
Doctor
SP
Silvana Pompili
Floriana
Marzia Damon
Gisella
Franco Marletta
Dario
Antonio Anelli
Father Clemente
Carla Mancini
TD
Tony Denton
BB
Bruna Baini
FE
Florian Endlicher
Dolores' Lover (creditless)
Karin Lorson
Dolores (creditless)
DETAILS
FREQUENTLY ASKED QUESTIONS
What is Byleth: The Demon of Incest about?
A young man becomes obsessed with Byleth, the demon of incest, and it leads to an unhealthy infatuation with his sister.
How long is Byleth: The Demon of Incest?
Byleth: The Demon of Incest has a runtime of 81 minutes (1h 21m).
Who stars in Byleth: The Demon of Incest?
The cast of Byleth: The Demon of Incest includes Mark Damon, Claudia Gravy, Aldo Bufi Landi, Franco Jamonte, Alessandro Perrella.
What is the rating of Byleth: The Demon of Incest?
Byleth: The Demon of Incest has a rating of 4.6 out of 10 based on 26 votes on TMDB.
GENRES (2)
Drama
Horror
