Cheerful and chubby mer-prince Kip publicly comes out as gay. To save his lover, royal guard Finn, from political persecution, they keep their relationship a secret. After an embarrassing mishap with his formal robes in public, Finn becomes Kip’s demanding training instructor. Princess Nessa, who was supposed to enter a political marriage with Kip, discovers their secret and chooses to be their ally. When Finn is critically wounded by an assassin, Kip grits his teeth and undergoes grueling training. Their relationship is exposed, and Kip renounces his title as crown prince to live among common folk with Finn. Kip aids civilians in times of crisis and earns their deep respect. His parents abandon the outdated royal traditions. In the end, Kip is crowned king, with Finn as his royal consort. He shoulders the heavy responsibilities of the kingdom while safeguarding their sincere love.
