"Highschool of the Dead: Drifters of the Dead" is an OVA (original video animation) that serves as a continuation of the "Highschool of the Dead" anime series. The story picks up after the events of the main series, where a group of high school students and a school nurse struggle to survive in a world overrun by a zombie apocalypse. The group, led by Takashi Komuro, includes Rei Miyamoto, Saeko Busujima, Saya Takagi, Kohta Hirano, and Shizuka Marikawa. Together, they navigate the chaos, battling both the undead and the moral dilemmas that arise in a collapsing society.

In this OVA, the group continues their journey, seeking safety and answers amidst the devastation. The narrative focuses on their efforts to find a secure location while dealing with the constant threat of zombies and the psychological toll of their situation. The characters face internal conflicts and external dangers, testing their resolve and relationships. The OVA maintains the series' blend of intense action, survival horror, and character-driven drama, with moments of levity to balance the tension.

The plot emphasizes the group's resourcefulness and teamwork as they scavenge for supplies, fend off zombie hordes, and encounter other survivors, some of whom pose additional threats. Themes of trust, sacrifice, and the fragility of human morality are explored as the characters grapple with the harsh realities of their new world. The OVA also delves deeper into the dynamics between the main characters, particularly the evolving relationships and tensions within the group.

"Highschool of the Dead: Drifters of the Dead" retains the series' signature blend of high-stakes survival and character development, offering fans a continuation of the story while maintaining the tone and style of the original series. The OVA provides additional insight into the characters' struggles and motivations, further enriching the narrative of the "Highschool of the Dead" universe.