Veyron City, a floating megacity created from the discovery of new energy sources. Shuu, a young man who owns and operates a small business in the area, leads a frugal life due to his extravagant spending habits. Kisara, a girl who comes to Shuu's office and home because she cares about him often. She worked while in high school in Veyron City, doing everything from office to housewife. Ayano, Shuu's ex-girlfriend and a senior colleague at the company he used to work for, is also worried about him. So begins the comedic romantic comedy of three people in a somewhat unusual relationship on a man-made island in the Pacific Ocean.