Aren't you going to become Nana and inherit the heritage?" Natsu, a nurse who lost her mother and became lonely for a lifetime. When I was feeling lonely, Ayukawa, the vice president of a super first-class hotel, appeared. Though elegant and strong, he makes an astonishing demand. Natsu has a twin sister, Nana, who wants to pretend to be her sister and get married. If he does so, he will have a huge legacy in the president's seat, Natsu, but he will be a substitute marriage.