Super special soldier Li Yifei retired and returned to the city, but Xu Yingying, the beautiful boss of the company who couldn't bear the urging of her parents, hired her as a fake boyfriend. But Xu Yingying's twin sister, Xu Shanshan, is a weird elf, very smart, and she firmly doesn't believe her sister. I found a boyfriend. One wants to expose, and the other wants to prove.