" this is zion, he will be your brother from now on, and he will be the new heir " your father, the duke, said as he introduce you your new brother who looked at you with cold eyes.

You cant do anything to against your father, because he did this for you. You are born with weak body and have a fragile health, so you often collapsed. The duke is worried about the future of his family so he decided to adopting another child who is capable to lead the dukedoom as well protecting you.