Japanese and Korean drama Tree of Heaven

A man has to give his beloved woman to a man she doesn’t love in order to better protect the woman he loves, but he can only stay by her side as a brother and protect her with his own life because he is reluctant to leave her. How painful and torturous it is for him. This extreme love makes it difficult for even the man who once regarded him as a love rival to feel hostility and jealousy towards him, makes another woman who also loves him feel jealous of the woman he loves but can do nothing about it,makes those who originally wanted to kill him reluctant to kill him too harshly