"Gundam Build Metaverse" is a three-episode anime series set in the "Gundam Build" universe, which revolves around the concept of Gunpla battles—competitions where participants use customized plastic model kits (Gunpla) to fight in virtual arenas. The story takes place in a near-future setting where the Metaverse, a virtual reality space, has become a global phenomenon, allowing users to interact and battle with their Gunpla in immersive environments.

The narrative centers on three main characters: Hiroto, a skilled Gunpla builder and fighter; Seria, a cheerful and talented newcomer to the Metaverse; and Masaki, a mysterious and experienced fighter with a deep connection to the virtual world. The trio becomes involved in a unique event called the "Gunpla Metaverse Festival," where participants from across the globe compete to uncover the secrets of a legendary Gunpla known as the "Metaverse Gundam." This Gunpla is said to possess unparalleled power and the ability to transcend the boundaries of the virtual and real worlds.

As the story progresses, Hiroto, Seria, and Masaki form a team to compete in the festival, each bringing their unique skills and perspectives to the group. Their journey is marked by intense battles, strategic teamwork, and personal growth as they face off against formidable opponents, including rival teams and enigmatic figures who seek to exploit the Metaverse for their own purposes. The series explores themes of collaboration, creativity, and the evolving relationship between humanity and technology.

The plot also delves into the backstories of the main characters, revealing their motivations and connections to the Metaverse. Hiroto's determination to prove his skills, Seria's desire to connect with others through Gunpla, and Masaki's mysterious past all contribute to the emotional depth of the narrative. The series culminates in a climactic battle that tests the limits of their abilities and the strength of their bonds, ultimately leading to a resolution that highlights the potential of the Metaverse as a space for innovation and unity.

"Gundam Build Metaverse" combines action, drama, and science fiction elements, offering a concise yet engaging story that expands on the lore of the "Gundam Build" series while introducing new characters and concepts. The series serves as both a standalone entry and a continuation of the franchise's exploration of Gunpla culture and its impact on individuals and society.