CEO's Regret After I Divorced - Chapter 3 What could have happened?

I originally thought this was a world like an ordinary urban novel…Drawing comics by myself, traveling is pretty good.
But tell me, what happened to this magician called “Emiya Kiritsugu” who jumped on my face?
Who changed the settings?
Currently involved in the content of “F/Z”, “F/SN”, “Fantasy Carnival”, “The Emiya’s Meal”, “The Holy Grail of the Imperial Capital”, “FLA”, “Elmello II Event Book”, “FGO”, “FE”, etc.
Others related to “JOJO’s Bizarre Adventure”, “Rebellious Lelouch”, “Persona 5”, “Attack on Giant”, “Death”
“FGO”, “FE Series”, “FA”, “FSF”, “Cangyin”, “Magical Girl Illya” will be involved next…

- Description from novelbuddy

I fell into a wannabe murim.But apparently martial arts is supposed to be difficult?Hm… Is it really that bad?

I lived a mediocre life. Trapped in the simulation of everyday mundanity, the 'Matrix' you might call it. The world killed my dreams, hurt my innocence, but I moved on just fine, struggling everyday to keep living.Until it came out of nowhere, without warning: The Apocalypse.I fought to survive. I lived alone in a world where all dead humans turned to undead. But, there was only so little the average human could do against creatures with superhuman strength. So I died. It was the end.Or was it?“From one cage to another.”I opened my eyes to a world where normal reasoning was as good as garbage. A world ruled by men with superhuman strength. A medieval world with swords and... No magic. Just swords and weapons. But still, that medieval world was not so medieval. It was a crazy place, a world that I couldn't fully understand.So I decided. I'll live because I lack the resolve to end myself. I'll live because i'm a coward. I'll live because in the end, I'll die of old age anyway. But before I die, I'll figure out the truth and secrets of this world. Just for the sake of it.And what's the best way to see the world in its entirety? Of course, it's to stand at the highest summit. And that's exactly what I'm going to do. So watch me rise.

Shu finished the final chapter of a hated apocalypse novel, only to wake up inside it hours later. In Zoxhia, dungeons open without warning, monsters flood the streets, and even the strongest heroes die miserable deaths.The only reason Shu has not joined them yet is a cheat no one else has ever seen: a Domain that can grow into an absolute safe zone. Armed with incomplete knowledge of the story, a dangerous system, and a world already heading for ruin, Shu has to survive, grow stronger, and change an ending where the demons win and everyone dies.discord: https://discord.gg/WkyX6NuZZA