Unlike traditional zombie survivors who become heroic leaders or skilled fighters, Yu is an anti-hero. He stumbles into his role; he has no martial prowess or survival skills. His only "power" is his sexual ability—a stark contrast to the gritty survivalism of titles like The Walking Dead , highlighting the pure ecchi fantasy at the heart of this narrative.

Translated, this phrase means: "The raw version of 'Only My Vaccine Can Save the World, Which Has Become Zombie-Infested.'"

| Keyword Part | Meaning | Reader Intent | | :--- | :--- | :--- | | Ore no | "My" (masculine, possessive) | Focus on a male, arrogant protagonist | | Wakuchin dake ga | "Only the vaccine" | Unique solution fantasy | | Zombie shita sekai | "World that became zombie" | Apocalypse setting | | Sukuero | "Can save" | Heroic (but twisted) goal | | | Untranslated Japanese text | Early access, no localization changes |

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At the same time, a militia named New Dawn cornered Kōichi and his small entourage. They demanded he join their cause. He refused. They threatened his sister. In the dark after the raid, Kōichi made a decision: to save the world he could not fix completely, he would risk himself.

Day 21: The Choice News painted the world in black. Governments collapsed. Warlords barricaded vault cities and looted vaccine labs. Two camps formed: those who wanted to exterminate every shadow as abomination, and those who sought to use Kōichi as a weapon—to raise obedient armies for control. The latter sent emissaries with chains of offers: safety for him and his sister, riches, power. The former sent hunters bearing silver blades and righteous fury.

Sunny injects Yuu with an experimental vaccine intended to save humanity. However, the vaccine introduces a bizarre side effect: Yuu can restore infected zombies back into normal humans, but the biological antidote can only be transmitted through sexual fluid contact. This premise drives the narrative forward, mixing harem mechanics, ethical dilemmas, and survival horror. Why Readers Search for the "Raw" Chapters