"Strike Witches: Operation Victory Arrow" is a three-part OVA series that serves as an interquel between the second and third seasons of the main "Strike Witches" anime. The story is set during the aftermath of the liberation of Gallia, a fictional European nation, from the Neuroi, an alien force threatening humanity. The series focuses on the 501st Joint Fighter Wing, a group of young girls known as Strike Witches, who possess magical abilities and use them to combat the Neuroi.

The first episode, "Operation Victory Arrow Vol. 1: Saint-Trond no Kaze," centers on Yoshika Miyafuji, the protagonist, as she returns to Fuso, her homeland, to recover from injuries sustained in battle. Meanwhile, the remaining members of the 501st are stationed in Saint-Trond, where they face a new Neuroi threat. The episode highlights the challenges of maintaining morale and unity within the team as they adjust to Yoshika's absence and prepare for future missions.

The second episode, "Operation Victory Arrow Vol. 2: Egeru no Hikari," shifts focus to the 502nd Joint Fighter Wing, stationed in Egeru. The 502nd, led by Eila Ilmatar Juutilainen and Sanya V. Litvyak, encounters a mysterious Neuroi that disrupts their operations. The episode explores the dynamics between the 502nd members and their efforts to protect the region while uncovering the nature of the new Neuroi threat.

The final episode, "Operation Victory Arrow Vol. 3: Ardennu no Kiseki," returns to the 501st as they are deployed to the Ardennes region to investigate a Neuroi stronghold. The team faces intense battles and strategic challenges as they work to neutralize the enemy and secure the area. The episode emphasizes the camaraderie and determination of the Strike Witches as they confront the ever-evolving Neuroi menace.

Throughout the series, the narrative balances action-packed combat sequences with moments of character development, showcasing the personal struggles and growth of the Strike Witches. The OVA series provides additional context and depth to the overarching story of the "Strike Witches" franchise, bridging key events between the second and third seasons while maintaining a focus on the themes of teamwork, resilience, and the fight for humanity's survival.