In The Supreme Fantasy World, Back In Time And Do Whatever You Want! - Chapter 46 - . Ye Fan And His Master Wang!

This is a story about the protagonist getting the system, going crazy in the biochemical apocalypse, producing aircraft and tanks, destroying zombies, saving good people and killing bad people.

- Description from novelbuddy

Carn wakes up from a vivid dream where he spent a thousand years as a gargoyle, guarding a demon lord's tomb.In this dream, he possessed supernatural powers, including the ability to teleport and instantly kill anyone within range who broke eye contact with him. Heroes, saintesses, adventurers, all fell before him.When he returns to his normal life, things take a strange turn. Carn realizes he still has the gargoyle’s powers, and the world he has woken up to seems different.But adjusting to the new reality is not the real issue. Carn brings back something nobody in this world has imagined. Not only he imports his powers to this alternate Earth, but he also carries over his gargoyle instinct and his hobby. He loves snapping human necks.Whether it's ordinary humans, explorers, super soldiers, cyborgs, mutated beasts, monsters, or mysterious entities from other dimensions, Carn eagerly anticipates snapping their necks, one neck at a time...In secret, of course.

Being given a chance and reincarnated is nice and all, yet why do I have to become that male friend who just watches the protagonist flirting with his harem?---World: Kaguya-sama: Love Is War - Hyouka ----

(The main story has ended!! A 1v1, sweet and clean romance novel) Shen Chuwei suddenly travels back to ancient times to become a neglected concubine of the Crown Prince. She thought it was the beginning of a leisurely life of eating and drinking, but unexpectedly, she ends up being deeply pampered by the aloof Crown Prince.Lady Xu: “Shen Fengyi, you'd better know your place. Tonight is my turn to serve His Highness.”Shen Chuwei says: “The Crown Prince is yours, I promise I'm just here to freeload.”That night, Shen Chuwei was kept in the Crown Prince's room~Lady Chang: “The Crown Princess is mine. You can't even dream of sharing her.”Shen Chuwei replies: “I'm not interested.”Later on, not only does Shen Chuwei become the Crown Princess, but she also gives birth to a pair of twins. The Emperor and Empress are in a scramble to pamper them, guaranteeing a smooth ride to victory.All the women in the East Palace vie to become the Crown Princess through their cunning and devious methods, yet all of these are clearly seen by Xiao Jinyan, who has the ability to read minds, causing him to avoid them.That is, until he sees a small 'salted fish', sweet-talking and soft-bodied, just to his liking, “You will serve me tonight.”As a freeloading 'salted fish', she trembles in fear: “Your Highness, I'm still too young.”