After the Triwizard Tournament, the experience changes Harry, and then he rediscovers himself. Then he also takes up lordships, business and then marriage due to the marriage law. Harry X Daphne
This is Post-Hogwarts, Harry Potter Fanfic. After the war, he takes up the Lordship of Potter, Peverell, Griffindor, black. He will feel used by people. He considers his family magic, also took the family business and lordship into his hands. This changed him in the years that followed, and as the population was depleted due to two wars, the ministry created the marriage law.