Amamiya Shinnpei has been saving up every penny he can for the past three years while working at a car repair shop ever since he finished junior high. Finally, he saved up 1,000,000 yen to take back his stepsister from family relatives. He reunites with his sister after three years and they start living together. However, their newly started lifestyle is ruined by troubles that continue to occur. Overloaded with loving emotions, a brother sister love story starts!