I Truly Am The Villian - Chapter 1241 - 1240 Forgetfulness Village, the Ancient Clear Spring, Speaking of Kinship

A teenager named Evan Mason was reincarnated into the magical world of Harry Potter and goes to school at Hogwarts!
With only his knowledge of the future and great talent for magic, he takes the path towards the top of the magic world, only to realize that ever step he took, changed everything!

- Description from Novelupdates

With the descent of the first blood rain, the world underwent a dramatic transformation.Once bustling cities became playgrounds for zombies.Some people merely survive in this post-apocalyptic world, while others thrive using their strength in this new world.Opportunists are on the move, and lone wanderers roam the land.Firearms, artillery, superhumans, and mutated creatures drive the world in a new direction.Clove Russell is reborn at the dawn of the apocalypse, leveraging his Space Element superpower to unlock the genetic limits of the human body, dominating the post-apocalyptic world without rival.Linda: “This bastard has no feelings whatsoever, only using me to vent his desires!”Kelly: “He's so strong, so formidable!”Wendy: “I will conquer him! Clove conquers the world, and I will conquer Clove!”

In the legends that were told, ten thousand years ago the twelve demon kings wreaked havoc upon the world, almost completely destroying it. Ten thousand years later, the late arriving Bella discovered that she had been screwed over by her reincarnation, the ranks of the Saviors are already filled and she has to change teams in order to pass the days. Having her gender changed into a beautiful girl… she endured that, not being able to join the righteous side and obtain cheat abilities… she endured, but what she could not endure, was that the world that she had transmigrated to was toxic beyond belief. No one here does their rightful jobs properly, be they heroes, demon kings, or creator gods… in fact, Bella felt as if they all had also started with the wrong faction!

A polite and lethargic boy was reincarnated in another world as a vampire bishoujo.