Mirai de Reiguuhi ni naru Hazu na no ni, Nandaka Yousu ga Okashii no desu ga...

Second Princess Rose of the Kingdom of Gridoll, who grew up shunned by her family, has a dream one day. In it, she boards the luxury cruise ship Princess Lea. Then, after her older sister Lea goes missing, Rose is offered as her substitute to Crown Prince Raphael of the great nation of Martan—only t…