Yukitaka Tsutsui, a Tokyo-born student, is transferring to Yamagata Prefecture for high school on a baseball scholarship. The townspeople are tremendously thrilled about his visit because he went to the best middle school in Japan for baseball. When he gets to his flat, he notices a strange man casually reading and wearing his clothing! The visitor claims to be an extraterrestrial who has crashed-landed on Earth with nowhere to go. He reveals himself to be Baka Ki El Dogra, the crown prince of the planet Dogra, and is only one of hundreds of aliens who have already settled on Earth. Despite his regal beginnings, the prince is a notorious cosmic idiot who delights in inconveniencing people for his own entertainment.