MTL - Lord of the Secret Art! - Chapter 497 revenge

In the year 2000, the System arrived on Gaia and changed the world of mankind. The environment became volatile and organisms evolved. To the humans, the System offered a class-base progression with a myriad of skills just like in old RPG games. From magic to bloodlines, as long as people immersed themselves in their passions, the System would incorporate their interests into classes and skills. And with the rise of new powerhouses, old nations were brought down and new ones rose from the ashes, stabilizing and governing their evolved populace.Around 500 years later since the dawn of the System, the story of our MC began. Drai was a musclehead, and his days were mostly spent for two purposes: becoming stronger and tougher! With his single-mindedness and crazy trainings he was finally offered a special class on the Revelation Day. From there on, his journey began. Starting from a prestigious academy and meeting his mentor and new friends, each with their own peculiarities, Drai steadily walked the path of power and invincibility. Party adventures, dark schemes, and veiled threats would accompany Drai throughout his journey.

One day, a Tower appeared, and with it a proclamation by God that Humanity is to be judged for becoming too corrupt.Regression…It’s an ability so fraudulent that it doesn’t require any detailed explanation.Yes, I also agree that it is a fraudulent ability, but…Isn’t it too much to regress due to just a slightest injury…?

Luo Qing Chen is a wandering spirit that died thirty thousand years ago, roaming the Chaos Space

In order to not turn into dust, she is bound by an ice cold system to travel through time and space to complete missions.

Girls that pretend to be weak?  Slap them without explaining.

A silly cannon fodder?  Helping them amass treasures.

Meeting a real male god?  All of them will pamper.

System: Dear masters, what do I do if my host even dares bully the heavens?  Waiting for an answer, it’s urgent!

A certain male god: Change systems.

System: ヽ〔?Д?〕丿

- Description from Novelupdates

The world was once at war with 10 alternate worlds. This was known as the Concept War and our world won 60 years ago. All of this was concealed so no normal people are aware of this fact in the current time.

After the death of his grandfather, the high-school student Sayama Mikoto is suddenly summoned by the giant corporation IAI. He learns this world is headed for destruction due to the acceleration of the Minus Concepts. To prevent this, negotiations must be undertaken with the survivors of the other parallel worlds so their 10 concepts can be released.

And so Sayama is caught up in the final battle to clean up after the Concept War which left behind so much enmity.