Michael Kenji Nakamuto is a formar Japanese Sumo player. He got injured seriously during a Sumo match so quit his career as a Sumo player. Now, he is in the United States for an adventure that he never had during his Sumo career. He got a new job and made many friends at the new work. One day, one of his new friends invited him for a costume party. There are his outfits for the party.