"Ranma ½: Nihao My Concubine" is a Japanese animated film based on the popular manga and anime series Ranma ½ created by Rumiko Takahashi. The story follows Ranma Saotome, a martial artist cursed to transform into a girl when splashed with cold water. In this film, he faces new challenges as he navigates romantic entanglements and martial arts competitions. The plot centers around Ranma and his friends as they become embroiled in a conflict involving a powerful concubine and a rival martial artist. The film combines humor, action, and romance, showcasing the unique transformations and relationships that define the Ranma ½ series.