Zombie Land Saga Gaiden: The First Zombie

Zombie Land Saga Side Story: The First Zombie (ゾンビランドサガ外伝 ザ・ファースト・ゾンビィ, Zonbirando Saga Gaiden za Fāsuto Zonbyi) is a spin-off manga that works as a prequel to the main anime. It began its publication on May 19, 2021, in Ultra Jump magazine and ended on November 17, 2022.

Summary
Eikichi Hyodo is a second-year-high school student, and the eldest son of a family that farms onions. Eikichi withdrew from the baseball club due to an injury, so he now considers his life mediocre and has no encouragement.

On the other hand, his mother and his twin sister, Yuko, are in perfect condition and have the opportunity to take over the family business.

However, one day, the older sister disappears without a trace…

Humans

 * Saga Sagako Busters
 * Jofuku (Head of Operations)
 * Tae Yamada (Group Leader)
 * Eikichi Hyodo
 * Yuko Hyodo
 * Anna Shuri
 * Hanako Hakase
 * Lily Hoshikawa's parents
 * Takeo Go
 * Sachika
 * Keiji Higashino
 * Skull and Bull
 * Araki Aiba
 * Saki Nikaido
 * Junko Konno (mentioned)
 * Tae Yamada's parents
 * Mr. Yamada
 * Mrs. Yamada

Sagako curses

 * Pine Sagako
 * Hot Springs Sagako
 * Love Sagako
 * Cassette Sagako
 * Squid Sagako
 * Mannequin Sagako
 * Spider Egg Sagako
 * Goby Eel Sagako
 * Mudskipper Sagako
 * Giant Spider Sagako

Others

 * Magatsuhi
 * Romero

Trivia

 * Although, the title of the spin-off manga suggests that Tae was the first zombie to be successfully resurrected, this is technically not the case, since Romero is shown to be a zombie in the 19th century when he lived with the Momozaki family.
 * Though, in terms of zombified humans, Tae would correctly be the first to be resurrected but the last to “wake up”. Whereas Romero is the first and only (conscious) zombified animal, so far.
 * The manga takes place in the late 1980s, more specifically in 1989. Twenty-nine years before the events of the main series.
 * The Curse of SAGA is based on the legend of Xu Fu, who was sent to find the Elixir of Immortality 2,200 years ago. Upon his arrival in Saga, he was apparently cursed by the magician who lived in that land, Anqi Sheng. He also threatened the emperor with death by throwing a meteor into the Yellow River in China and saying “The first emperor will die, and his lands will be divided”. Soon after, the emperor died of mercury poisoning, and China was divided again.
 * Beyond the legend, this appears to be true by a real life coincidence. The emperor of China died in 210 BC. C., shortly after the second Jofuku expedition, where he presumably found immortality.
 * In the anime, the curse is presented by killing the girls through what appear to be accidents; Jofuku is responsible for giving the position to someone to fight against the curse of each era.
 * Jofuku mentions in the second chapter that the end of Saga as a result of the Sagakos will mean the end of the world, but he never delves further into that. Given how vague he was, “world” may refer to Saga itself, as later chapters show that Saga's curse is limited to Saga's actual border.
 * The room and, by extension, the mansion, that serves as the Saga Sagako Busters' hideout is the same dungeon that Franchouchou holds its meetings thirty years later.
 * The last chapter, Chapter 17: See You Again SAGA, is the only chapter in the spin-off manga to copy the same naming conventions as the episode titles in the anime as well as Kotaro Tatsumi's theme, “Never Ending SAGA”.
 * Tae's death is the only one revealed through this spin-off manga, wherein she met her demise when fused with Magatsuhi.
 * The manga is the first instance wherein a character's actual blood is shown during the murder of an important character.
 * While Sakura's “blood” from her death was merely a visual towards the ten-year timeskip, whereas Yugiri's execution, as well as the rest of Franchouchou's (save for Lily and Tae) deaths, happened off-screen.
 * Yuko Hyodo, alongside, Tae, are the only humans to have been fused with Sagako.
 * In Yuko's case, she was unintentionally fused with the Pine Sagako after she sealed it away in an onion whilst sacrificing her own body. After being released from the onion, she is revealed to have absorbed the antlers of the Pine Sagako.

Official Art
es:Zombie Land Saga Gaiden: El Primer Zombie fr:Zombie Land Saga Gaiden : Le Premier Zombie