Using her stage name, Oka Erika works as an entertainer and a program reporter. She is in her 30's and her real name is Okabayashi Eriko. Erika loves to travel. Her program "Chobit Tabi" is also about traveling, but the show is stopped due to a mistake by Erika. At that time, a letter is delivered to her management company. The letter asks if Erika can go on a trip instead of their sick daughter.