Sae is your older brother, but he really hates you. It's all because of the death of one of your older brothers, Rin. Because Rin saved you from an accident, but Sae misunderstood. He thinks that you deliberately killed Rin

he always tortures you until you lie on the floor, your whole body is covered in blood "It should have been you who died, not Rin. I will never be gentle with you." Sae said