Ghosts Know What I Experienced - Chapter 45.1: Stabbing the heart with each word.

Jiang Bai woke up one day and found with shock that he had transmigrated to a parallel world that is similar to Earth. There, he was granted a cheat system to help him forge the path of a tyrant in this new world. He was now stuck in this parallel world body, the body of a weak and cowardly person. Join Jiang Bai as he rose to the top in this new world!

- Description from Novelupdates

Li Yiyi never expected to be chosen by fate, being suddenly ripped from the modern times to the ancient times. It wasn’t a full-body transmigration, just a soul transfer. Heaven must have thought it would be too exhausting to send everything over, so only the essence got transferred.In ancient times, Li Yiyi became Li Suniang, a newly widowed woman with a young child. While technology in ancient times wasn’t advanced, the air was fresh and there was no need to worry about pollutants. All the food was purely organic with no pesticide residue or concerns about genetically modified ingredients.It was often said that widows attracted trouble, and sure enough, this young widow caught the eye of a scarred man in the village. Despite his fierce appearance, he turned out to be a gentle person. In the end, the scarred man married the widow and, together with her child, and they began a life filled with mutual support and raising a family.

Genius, antisocial, solitary, intractable , maniacal.

At the turn of every era, it is he who raises the flag of the rebel cross.

Winners take it all, losers take the fall.

He who brings order to a chaotic world, assembles talents and masterminds.

He who hides among the crowd, yet stands on the top of the world.

— The one and only, him.

- 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.