Doomsday: I Obtained A Fallen Angel Pet At The Start Of The Game - Chapter 19

Doomsday comes, and human beings enter the heavenly world.
Ten years later, Yang Chen, who was betrayed tragically, returned strongly with the Tianyu bug. In this life, he vowed to make the betrayal pay the price. He has a powerful bug bonus, just like an open hang. Frightened to hear…

- Description from novelbuddy

Lin Yan had transmigrated into the world of Immortals and had become a Heavenly Emperor who was already defeated by the Male Lead along with the ten Female Leads at the beginning of the plot.

But as Lin Yan was about to die, he awakened a power that he could use to rewrite his past doings.

So, Lin Yan has begun to rewrite his past.

When Lin Yan was still a child, he struggled to feed Xiao Yanran, one of the female leads, who was then younger than him. He had to strip his Supreme Bone and give it to her, protect her from the obstacles. He made a vow, “As long as I am here, no one will be allowed to bully you.”

Later when Lin Yan’s cultivation rose , he had run into Xiao Mei, yet another heroine, and the two of them spent time together and eventually got married. When the Devils were about to invade their world, Lin Yan said staring right into his wife’s eyes, “I will protect you with my life…”

And soon he rose to become the Heavenly Emperor.

Everything he did was to shelter his loved ones and to protect the world.

However, his actions were misunderstood by the world.

…

Let’s see what all Lin Yan had done in the past…

Ye Yang, the 4th young master of the Ye cultivation clan, was once the weakest member of his family. His feeble cultivation and stagnant growth made him a target for bullying, and he was stripped of his chance to become clan head. While his peers surpassed him, reaching advanced stages like Qi Awakening and Meridian Opening Cultivation Stage, Ye Yang remained stuck at the 9th level of Body Tempering.Ashamed and defeated, he isolated himself from his family, refusing to meet anyone, including his mother Yu Mei and sisters Ye Ling and Ye Mu. Although his father saw him as a disgrace to the Ye family, he still tried to help Ye Yang overcome his limitations. In a desperate attempt to escape his misery, Ye Yang tried to end his life by cutting his wrist. But as he lay dying, a mysterious voice intervened:“If you don't want to live for yourself, then be mine and entertain me.”Ye Yang lost consciousness, only to awaken the next morning to a strange screen window:[Choice-based System][Welcome: Player Ye Yang]This marked the beginning of his transformation, as he embarked on a journey guided by the enigmatic System, confronting his dark past, and uncovering the secrets of his world.

Perhaps it is the choice of fate. As a senior otaku, Qian Lingfeng got the “steel shell system”. However, when he swept the world with the system, became a local rich man, made all kinds of beautiful women, opened a harem, and realized the ultimate fantasy of thousands of otaku, he found that things seemed far from simple!
When the end comes, biochemical zombies suddenly come down, fierce beasts are in power, bloodthirsty zerg roam to kill the world, and human lives are comparable to dirt. Where will weak human beings go in this world? Is humanity going to be extinct? Or … can an otaku save the fate of the human race?

- Description from Novelupdates