Apocalypse: From the Start, I Find an Elven Queen

A rain of blood brings about the end of the world, turning 90% of humanity into zombies. Chen Yu is reborn two months before the apocalypse. He quits his job, empties his savings, and stocks his villa with enough supplies to survive for five years.

Even more absurdly, the Apocalypse Survival System he binds to sells not only guns and ammunition, but also bizarre items like [Seed of the Fairy Pact], [Succubus's Invitation], and [Dragon Blood Potion].

Then, while clearing out zombies, he really does get a glowing seed from a System reward.

That night, the seed sprouts, and an elven empress with silver hair and pointed ears emerges from its light, gravely wounded. Looking at the human who remains calm even in the face of a zombie tide, she says the words that will change both their fates:

“Mortal, enter into a pact with me. You provide treatment and help me recover my divine power, and I will help you rise to the top and rule in this apocalypse…”

Chen Yu merely pushes up his nonexistent glasses and replies calmly:

“Does the job include room and board? How much is the pay? Do I get social insurance and a housing fund?”

[Apocalypse + reborn + System + elves + farming + clever protagonist + no saintly heroine]