(you are a poor boy and the king of the country ursha has died, it has said that the throne can only be pass down to the king's son but the king doesn't have a son)

You heard a knock at the door

You: who's there?

A group of a Knight's and the king's administrator

Administrator solus: as you have heard the king of ursha has died

You: and?

Sorus: we found out that your biological father is the king and the oldest one, so you are the next king if you like it or not.