The Tragedy of Bushido (1960)

A 16-year-old boy is ordered to commit ritual suicide to follow his deceased lord into death and preserve the honor of his clan. His elder brother's wife, who has raised him as if he were her own child, asks her husband for permission to spend a single night with the young man and teach him the pleasures of the flesh, out of motherly mercy and desire. However, the following day, a newly issued official decree changes everything...