This is an Alternate History Genre

I, the unemployed, who graduated from Oxford and majored in History and Economics, was dead in a car accident. But, I was born again, as a son of Blood Mary and Felipe II, a person who didn't exist in history. 

In order to survive and secure my throne, after winning the civil war which occured right after the death of Bloody Mary, I have burned my competitor/my aunt Elizabeth - who would have become Elizabeth I, the 2nd popular queen after Queen Victoria - to death, and decided to become greater ruler than her. 

I will be the king of Great Britain, the Netherlands, Spain, Portugal, France and Itlay - the king of 6 realms - using my historic and economic knowledge and my Tudor, Habsburg lineage as a claim for those crowns. 

No one, nothing, shall stop me.