"Marginal Prince" is a show based on a popular love simulation game for girls. The protagonist, Yuta, travels abroad to a remote island in the Pacific called Alphonso. This island is home to Alphonso Gakuen, an all-male dormitory school that caters to the offspring of the elites. The school focuses on courses related to empires and alchemy, and after enough studying, the students are labeled as "Marginal Princes." Follow the story of Yuta and his classmates as they strive to become kings through trials and destined paths.