Responses
Its not incestuous, dont worry they are not related at all. They just live together because both their parents were murdered, so the black hair acts as the blond hair guardian and protects him from the one who killed their parents.
But the blond hair didn't know anything cause the past happened when he was still a child and the black hair keep the past secret to protect him, the blonde hair only knew that the black hair was his real brother, and hated him because of some misunderstanding in the past.
They both actually really love and depend on each other. In the end they got together don worry about the drama.
ummm im on chap 13 rn and i dont know if i should keep going.... isnt this incest...??? sorry i dont get it is the younger bro adopted or nahh???