Kouhei Aizawa is a freelance cameraman who moves from Tokyo to Karuizawa with his roommate. He starts dating Kaoru, his roommate's sister as well as Noriko, the female head of a bosozoku.
Following in the footsteps of manga such as Doraemon and Obake no Q-Taro in that the alien Ganmo (who resembles a chicken wearing sneakers) sets out to help his adopted human friend Hanpeita.