VRMMO: My first Contractee is Yandere - Chapter 63 Again against World Tree

This is a cliché story about two young people saving the world.

The aliens came with hostility.
Facing the invasion of aliens, human beings are weak like ants.
So this is the end, the real end.
But there is resistance when there is an invasion.
For some, this is not the end, it is war.
So this is war.
Real war!

- Description from Qidian

On December 11th, the apocalypse began. A new, mutated coronavirus—the Zeta variant—spread worldwide, and it was far more deadly than any version before it. Those infected without strong immune systems turned into zombies, and within two days, chaos reigned, wiping out 80% of humanity.Zack, an ordinary guy, found himself in the middle of this nightmare, struggling to survive. Lacking the skills to fight off the zombies, he was soon overwhelmed and met a tragic end… or so he thought.When Zack suddenly finds himself alive again, he’s back at the start of the apocalypse but with one huge difference—an advanced AI has armed him with powerful technology. Equipped with a zero-point reactor, power armor, a super serum, and much more, he now has the tools to turn the tide.Follow Zack as he builds a new civilization from the ruins and fights to reclaim the world in this thrilling journey of survival and innovation.

One rule: Survive. Everything else is optional.Reika Kagetsu doesn’t want to be a hero. She just wants to feel—pain, fear, adrenaline—anything to remind her she’s still alive.Tenshiko Academy promised her that.What she got instead? Brutal training. No rest. No second chances. And monsters—inside and out.Now she’s fighting the Shikiban: creatures born from blood, madness, and buried secrets. But the deeper she goes, the more she begins to wonder...What if she’s one of them?Power always comes with a price. And Reika is about to pay it in full.