"xxxHOLIC Rou" is a continuation of the supernatural anime series "xxxHOLIC," based on the manga by CLAMP. The story revolves around Kimihiro Watanuki, a high school student plagued by the ability to see spirits and supernatural entities. His life takes a dramatic turn when he encounters Yūko Ichihara, a mysterious and powerful witch who runs a wish-granting shop. In exchange for Yūko's help in suppressing his spiritual sight, Watanuki agrees to work at her shop, where he becomes entangled in a series of supernatural events and moral dilemmas.

The narrative of "xxxHOLIC Rou" picks up after the events of the original series, delving deeper into Watanuki's evolving relationship with the supernatural world. Yūko's absence becomes a central theme, as Watanuki takes over the shop and continues to fulfill the wishes of those who seek its services. The series explores his growth as he grapples with loneliness, responsibility, and the lingering mysteries surrounding Yūko's disappearance. Watanuki's interactions with recurring characters, such as his rival and friend Shizuka Dōmeki and the enigmatic spirit Mokona, further develop the story's themes of fate, sacrifice, and the consequences of desire.

Each episode typically features a self-contained story involving a new client or supernatural phenomenon, often tied to a moral lesson or philosophical question. These episodic tales are interwoven with the overarching narrative of Watanuki's journey, as he uncovers more about the shop's purpose, Yūko's past, and his own role in the balance between the human and spiritual realms. The series maintains a tone that blends the eerie and the whimsical, with moments of humor and introspection.

"xxxHOLIC Rou" expands on the original series' exploration of human desires and the price one must pay to achieve them. It also delves into the concept of time and memory, as Watanuki confronts the transient nature of relationships and the inevitability of change. The anime remains faithful to the source material's intricate storytelling and rich symbolism, offering a compelling continuation for fans of the franchise.