Pokemon: Spiritual Master - Chapter 33: Former Elite Four Member

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

“Hubby, I don't want anymore, I feel terrible...” “Baby, be good, finish up this medicine.”The handsome man embraces the woman in his arms, coaxing her tenderly as he feeds her the medicine.Joanna Lawrence stumbles upon Ashton Heath, the most esteemed scion in all of Closia City, and ends up sleeping with him for the night. After he offers her benefits in exchange for their marriage, the newly appointed Mrs Heath suddenly has the power to have everything she ever wished for.“Hubby, I slapped the Movie Queen Faye today, was I too much?”“Baby, does your hand hurt? Let me rub it for you.”“Hubby, I maxed out your credit card, are you angry?”“Baby, are you happy with your purchase? Let me know when you need more.”“Hubby, I'm tired today, I don't want to move...”

What’s worse than finding out you’re that Louis XIV when you’re a baby?

Of course there is, for example, it’s still a magic version.

- Description from novelbuddy

Baek Ain is your typical lazy guy.

He graduated from university at age 22 with a random degree he chose out of boredom and stayed single because fate decided so until that event happened.

“What? Where Am I??”

After a horrible incident, Ain transmigrated to another world. Or precisely to be a villainous and mobs character.

He died countless times because of the world's protagonists, gathering hatred toward them.

“What the fuck! What do you mean I stole your wife? I've been single since coming into this world!!”

“Hero, please save this world.” A goddess is begging me to save her world from the Demon Lord.

“Wait... Begone thot! That Demon King is my younger sister from 69th Transmigration.”

“How dare you!”

A beautiful heroine is hugging me from behind, wishing to accept her feelings.

“Shoo, Heroine! I don't need useless baggage with me. Side characters are better than you!”

And so, Ain's journey began to end this shitty transmigration cycle.