Save the Sick and Weak Heroine, I Will Raise Her to Be a Queen

The male protagonist accidentally unlocks a mysterious game and completely controls a sick and orphaned girl in a different world. He thought it was an immersive strategic development, helping her to break out of the deep house, build power, and bring peace to the troubled times. He raised a dying orphan to become the founding queen of the country, and also relied on game benefits to achieve financial freedom. It wasn't until the day of the coronation ceremony, when she looked up from the dragon throne and looked through the screen, that he realized: this was never a game.