White Guardian (yaoi manga)

The Kingdom of Landa, once a proud country, is weakened by internal espionage and strife with its neighbors. In order to save the country, Linth Highwind Belc Landa IV, Crown Prince of Landa, returns to his country determined to bring about change. But missing from his plans is a man – the one man who had left behind the intrigue of the palace for the freedom of the sea.