The older brother is an unforgivable psychopath. Seduce and abandon a much younger girl who has always adored him and who actually might be his half-sister just to get back at her mother. Even after he finds out that it was his father's entire fault and that her mother was innocent, he deceives the girl and tries to rape her in the dark. And all this time, he has a lover he has no intention of leaving. He is totally irredeemable. I can't understand the calm reactions of his father and her mother when he admitted and catalogued his vile intentions. In my family, he would have been totally disowned and told that he was never, ever to show his face again. Unforgivable means just that!
Nude Na Kajitsutachi