"Ranma ½: Nihao My Concubine" is a two-part anime OVA that serves as a continuation of the "Ranma ½" series, focusing on the comedic and chaotic misadventures of Ranma Saotome and the ensemble cast. The story begins with Ranma and his father, Genma, traveling to China to train in martial arts. During their journey, they encounter a cursed spring, where Ranma falls into the Spring of Drowned Girl, causing him to transform into a female whenever splashed with cold water. Genma, meanwhile, falls into the Spring of Drowned Panda, gaining the ability to turn into a panda under the same conditions.

The narrative shifts to the present day, where Ranma and his fiancée, Akane Tendo, are embroiled in a series of misunderstandings and rivalries. The central conflict arises when a wealthy Chinese heiress, Princess Kirin, arrives in Japan, claiming that Ranma is her betrothed. Kirin’s arrival is tied to a promise made by Genma years earlier, where he agreed to marry Ranma to Kirin in exchange for financial assistance. This revelation creates tension between Ranma and Akane, as Ranma struggles to navigate the situation while avoiding further complications.

Kirin’s entourage, including her loyal bodyguard Mint, adds to the chaos. Mint is determined to ensure the marriage proceeds, leading to numerous confrontations with Ranma and Akane. The story escalates with a series of comedic battles, misunderstandings, and romantic entanglements, as Ranma attempts to resolve the situation without alienating Akane or dishonoring his father’s promise. The OVA maintains the series’ signature blend of martial arts, slapstick humor, and romantic tension, with Ranma’s gender-swapping curse playing a pivotal role in the unfolding events.

The resolution involves a climactic showdown where Ranma must prove his worthiness to Kirin while reaffirming his commitment to Akane. The OVA concludes with the restoration of order, though the underlying comedic tone ensures that the characters’ relationships remain as tumultuous as ever. The story highlights the recurring themes of loyalty, honor, and the complexities of love, all while delivering the fast-paced, action-packed humor characteristic of the "Ranma ½" series.