Yukitaka Tsutsui, a schoolboy born in Tokyo, is relocating to Yamagata Prefecture for high school on a baseball scholarship. Because he attended Japan's top middle school for baseball, the local residents are thrilled about his arrival. However, upon reaching his apartment, he finds a strange man casually reading and wearing his clothes! The stranger claims to be an alien who crash-landed on Earth and has nowhere else to go. Identifying himself as Baka Ki El Dogra, the crown prince of the planet Dogra, he is merely one of the hundreds of aliens who have already settled on Earth. Despite his royal background, the prince is a notorious intergalactic fool who disregards inconveniencing others for his own amusement. Whether he is conducting absurd tests on his subordinates, granting strange powers to random children, or simply being a nuisance, no one is safe from the idiot prince's antics!