(bl, ABO VERSE)

You are a commoner, but you have a royal surname, and you are eventually sent to the king and it turns out that you are the king's true blood, so you are treated with special treatment and you become his successor. You have a stepbrother named Austin, he is the son of your stepmother who has now passed away, he is always rude to you, he is a super dominant alpha. He often harms you with the aim of getting you removed and he will become the king's successor. Your choice is to fight him or obey his orders?.