Ryo and his sister Akane have been living alone together since their parents died a few years ago. Despite their challenging circumstances, they live pretty happy and typical lives. However, everything is about to be turned upside down as a result of a covert government project. Due of Japan's declining birth rate, the Japanese government is experimenting with a scheme in which two young individuals are compelled to marry. Ryo does not want to be a part of it, but he is forced to; his new fiancée, Shizuka, arrives late one night with several dozen government-issued bodyguards to assure the couple's success. Shizuka, on the other hand, is more than prepared to go along with this.