"Negima!? Summer OVA" is a two-episode original video animation that serves as a continuation of the 2006-2007 anime series "Negima!?" The OVA is set during the summer break and follows the adventures of Negi Springfield, a ten-year-old wizard from Wales, and his class of 31 students at Mahora Academy. The story begins with Negi and his students preparing for a summer trip to a remote island. The trip is intended as a reward for their hard work, but it quickly turns into a series of comedic and supernatural misadventures.

Upon arriving at the island, the group discovers that it is inhabited by strange creatures and mysterious phenomena. The island's environment is unpredictable, with sudden weather changes and magical occurrences that challenge the students' resourcefulness. As the group explores, they encounter a series of trials that test their teamwork and individual abilities. These trials are often tied to the island's magical nature, requiring Negi to use his wizardry and the students to rely on their unique skills.

The OVA focuses heavily on the interactions between Negi and his students, particularly Asuna Kagurazaka, who shares a close bond with him. Asuna's protective nature and her growing feelings for Negi are highlighted, adding a layer of emotional depth to the otherwise lighthearted narrative. Other key characters, such as Konoka Konoe, Setsuna Sakurazaki, and Evangeline A.K. McDowell, also play significant roles, contributing to the group's dynamic and the unfolding events.

The plot takes a turn when the group discovers an ancient artifact on the island, which is revealed to be the source of the island's magical disturbances. The artifact poses a potential threat, and Negi must work with his students to neutralize it. This leads to a climactic sequence where the group faces off against a powerful magical entity, showcasing their growth and camaraderie. The resolution of the conflict reinforces the themes of friendship and perseverance that are central to the series.

Throughout the OVA, the tone remains light and humorous, with moments of action and suspense. The character-driven narrative allows for individual arcs and interactions to shine, providing fans of the series with a satisfying continuation of the story. The OVA concludes with the group reflecting on their experiences and looking forward to the future, leaving the door open for further adventures.