Chapter 1: The Guy Who Smells Like Onions is Naked and in Full Swing!

Chapter 1: The Guy Who Smells Like Onions is Naked and On The Go (タマネギのようなにおいがするあの男は、裸で、外出先で最高に Tamanegi no yōna nioi ga suru ano otoko wa, hadaka de, gaishutsu-saki de saikō ni) is the first chapter of the spin-off manga series of Zombie Land Saga, titled “Zombie Land Saga Side Story: The First Zombie”.

Manga Link
https://www.reddit.com/r/ZombielandSaga/comments/nifm8m/zombieland_saga_gaiden_chapter_1_full_english/

Synopsis
Saga faces a curse of thousands of years due to the search for immortality, if nothing is done the whole world will be in danger. Fortunately, a group of warriors uses the power of Saga's local onions to counter the evil that comes from the darkness!

Plot
Thousands of years ago a curse was born because of those who sought immortality, the story of a remote region heading for imminent destruction.

Eikichi Hyodo works on the family farm after having a shoulder injury that does not allow him to play baseball and keeps him away from his friends, his twin sister Yuko Hyodo helps him collect the family harvest and mentions how important they are. the onions as they both travel by tractor to the harvest area, Yuko tells him that onions keep evil away and that she defends people in the shadows, Eikichi doesn't understand what she meant by that.

At night a mysterious truck appears with the inscription of "Saga Sagako Busters", in it are the group of 4 girls made up of Anna Shuri, Yuko Hyodo, Hanako Hakase and their leader, while they speak they see how weak Yuko is and they ask her If they can perform the exorcism tonight, she says that she is still strong, finally they reach the forests of Karatsu where they meet the demon Matsunokami, who has the shape of a deer and his antlers can extend many meters, the girls seal the zone and stop the demon by cutting its antlers, Yuko prepares for the exorcism but is caught by the demon when he is doing it, so she falls weak and tells the group that she has a younger brother.

It has been a week since Yuko has not returned and her grandmother reproaches him because she thinks it is his fault for smoking and that now she is a criminal, Eichiki does not know what happened to her sister and from one moment to another they receive visits, they are the Saga Sagako Busters and from one moment to another they kidnap Eichiki.

Hours after he wakes up in a cell and on the other side are the girls who tell him if he is ready for the truth of what happened to his sister, Hanako explains that his sister turned into an onion after using all her energy to seal a demon, obviously Eichiki doesn't take it seriously even after a brief explanation. Hanako explains that her sister Yuko told them that he could have inherited the power to exorcise demons through onions, now the girls introduce themselves to Hanase Hanako the self proclaimed beautiful scientist who creates weapons for the group, Shuiri Anna the deadly beauty of the group. group and part-time worker, and finally... well it seems that the group leader does not want to give her name. Hanako explains that her sister had the ability to purify demons but since she became an onion now Eichiki must fight in her place, but for this to work she must look like a woman for some reason. The leader mentions that without Yuko they cannot do anything against the demons and lashes Eichiki with a whip for getting too close, the alarm sounds because a demon appeared, the girls dress and take Eichiki to the Ureshino hot springs where Eichiki does not notice nothing normal besides tired old men.

He is distracted for a moment and goes to the onsen, where an old man tells him that this hot spring where it rejuvenates the skin, but from one moment to another a demon appears and makes the old people start to age, Eichiki screams and draws the attention of the leader who is going to fight with shovels, the Onsen demon throws balls of water that destroy everything in their path, Eichiki has flashbacks of his sister where he realizes that the injuries he constantly had were from the fights against demons at night, The leader realizes that the humidity of the onsen blocked her radio and proceeds to fight with her shovels and is surprised when Eichiki managed to get the elders out and save them, the rest of the group arrives with onions that Eichiki hits against the demon and manages to seal it momentarily before escaping and leaving the whole place reeking of onions.

Back at the mansion, the Saga Sagako Busters still have Eichiki kidnapped and redo the group's theme "Purity! Justice! Beauty!" They are the ones who protect Saga from the imminent destruction, finally the leader reveals herself as the last lady of the trades... Tae Yamada and decides that she herself will be the one in charge of training Eichiki to fight the demons.

Humans

 * Saga Sagako Busters
 * Tae Yamada (Group Leader)
 * Eikichi Hyodo
 * Yuko Hyodo
 * Anna Shuri
 * Hanako Hakase
 * Death metal fans (flashbacks)

Demons

 * Matsunokami
 * Onsen Demon

Trivia

 * This is the first time that we are shown that there are more supernatural beings besides zombies within the zombie land saga universe.
 * The Busters Saga theme refers to Pokémon Team Rocket.
 * Tae was an office worker by day and a demon slayer by night
 * The mansion was her property and it was the one she used to train and make weapons, the group's van is the one that Kotaro uses today but painted black, Kotaro's makeup is what the girls used to look beautiful, the glasses Sunshine are also her property, the shovel that Kotaro was seen in the first episode was from Tae's weapons, basically Kotaro only used what was in the mansion to make his group of idols.
 * This means that being idols is only training to fight future demons that could be released in Saga at any time.

es:Gaiden: Capitulo 1