Toaru Majutsu no Index: New Testament - Volume 2, Chapter 4: Invitation, and That Name Is... Lecture_Four (and_More).

After Chuzheng is suddenly pronounced dead by a system all of a sudden, her only worry in life becomes—spending money. Ever since she gets stuck with this system, her back is no longer sore and her legs no longer ache. Heck, there isn’t even a time when she goes out of breath.System: Let us set a small goal first and squander a hundred million… Little Miss, stop right there! Don’t activate the invincible mode!(▼皿▼#) Chuzheng: Can you please explain what is this thing that is leeching off me?Random Thing: Babe, you can do whatever you want to me.Chuzheng: (touches her blade) In-In that case, I will not stand on ceremony.System: Little Miss, please put the saber down right this instant! (▼へ▼メ)#LittleMissAlwaysDoesAsShePleases.

When he was categorised as an Omega at the age of 13, Rong Yi made a tiny little wish. In the future, he wanted to fall in love with a tall, handsome and elegant Alpha whom he could share a romantic love with, then build a blissful family with him and give birth to many cute babies together.

A few years later, he grew into a tall, handsome and elegant Omega and was passionately pursued by countless admirers of the same gender, while all Alphas backed away from him in face of his superiority.

This was not the life he wanted.

- Description from Novelupdates

The nuclear holocaust which caused the collapse of the Old Times on Earth should have wiped out all human life on the planet. Yes, the gods set up their beautiful Elysiums to provide sanctuaries for their chosen, but by all rights everyone outside the elysian lands should’ve perished long ago. Yet somehow, human life still managed to persist, even in the deadly, mutant-infested wastelands.

Cloudhawk was a young scavenger who dreamed of being as free as the hawks in the skies, yet seemed destined to live out his life scrounging for scraps in the wasteland ruins. Fate, however, is ever-fickle. A chance meeting with a ragtag group of mercenaries changed the trajectory of his life, bringing him into a world with mutants and metahumans, demonhunters and godslayers, and even gods and demons. Cloudhawk would find his own place in a world that was far greater than he had imagined, find his own path between the zealous light of Sumeru and the whispering darkness of the Abyss… and one day, he would find that even gods may fall.

This is the story of a crazy lich who possesses an internal game system and brings catastrophe to the entire world.