An Alien on the Planet.High school student and baseball player Yukitaka Tsutsui moves into his apartment, shocked that an alien named Prince Baka has already invited himself inside. Prince Baka explains that his escape pod crash-landed on Earth two nights ago. As further proof that he is an alien, Prince Baka even gives Yukitaka a controller to make the escape pod explode from a distance. Miho Edogawa swings by from next door and gives Yukitaka a welcoming gift. As the news later reports that there were no casualties, Yukitaka allows Prince Baka to stay overnight. After Prince Baka retrieves an orb seen on the news, Yukitaka witnesses him oozing blue blood. However, Prince Baka heals his wounds near a tree, causing it to bloom. The next day after Yukitaka has baseball practice, the police shows up at Yukitaka's apartment looking for Prince Baka. With Yukitaka playing it down, the police leaves after telling him that Prince Baka is wanted for murder. Prince Baka later shows Yukitaka a holographic image from the orb, an arthropod from the planet Jacqueline S known as a Clive, which is extremely adept in mimicry.