Lord of Queenscrown

What if there was a family that ruled Queenscrown, land taken by Good Queen Alyssane was given back to the North for their support of Rhaenyra during dance of dragons? Some were not happy about it and their descendants are still bitter about it till even during Roberts Rebellion, conspiracy in the shadows, oaths broken, families shattered and in the middle of it. The 3rd son of the heir, now the only heir, in reality he's just some random bum from another universe who's only achievement was passing university without using AI Maybe harem (Idk, definitely no smut cant write it for the life of me maybe will try in later chapters but dont get your hopes up) Action Fantasy