Prince's Butler PsB

After being banished from his noble house, Gianni wanders the streets of Gallia. He lost everything after placing second in his graduating class in medicine, which dishonors his family---a family of doctors. As he traipses through the capital in a one rainy afternoon, a rider hits him. He falls unconscious. The rider takes him to the best hospital in the Capital which is in the academy that he once studied in. Clueless of the rider’s identity, Gianni accepts the rider’s kindness. Unable to repay his medical bills and nowhere to go, Gianni accepts the rider’s offer to serve the Prince of Gallia, who is, in truth, the person in front of him, Julien S. Montmirail.
Prince Julien slowly develops feelings for Gianni. Gabriel, a butler serving the prince who helps Gianni on the art, also falls for Gianni. Gianni’s love rival for the prince’s heart appears. Princess Ariana of Inglatera is Julien S. Montmirail’s fiancée. However, the two does not have feelings for each other, and their marriage is but a political one.
War breaks out. The neighboring kingdom of Essenia tries to prevent the unification and alliance of Gallia and Inglatera through marriage. Gianni serves on the front lines of the battle. The forces that he works with becomes isolated from the rest of the kingdom. He feels grief and sadness due to the uncertainty. Prince Julien orders the army to rescue them.
The war ends with the Essenia losing. However, the kingdom is thrown to turmoil as Julien S. Montmirail confesses his love for Gianni. He intends to break his marriage and abdicate from the throne to live a life of simplicity and spend his days peacefully with Gianni. He proposes to install a new form of government. However, the nobles and the upper-class revolts against his wishes. His brother, Louie S. Montmirail leads the revolt.
Ariana, who was in Julien’s plan, cooperates with him and quells the rebellion. After months in the battlefield together, Gianni and Julien fall in love even deeper. In one battle, an arrow heads toward Prince Julien’s direction. Gianni sees it and pushes him away. The arrow hits Gianni. Julien becomes enraged and saddened. He quells the revolt and summons the best doctors in the land to heal Gianni.
Gianni’s father comes forward and heals Gianni. A new government is established, and peace returns to the land. Gianni and Julien retires to the countryside on a house on top of a hill beside a lake where swans sing their love song all day long.