This story starts with two being that remain in the vast space of the cosmos playing a game of chess that might've started a couple millennia before the current timeline
One of the beings spoke with pride "I might be the victor after all this time, You shall know defeat at last shall you not my friend?"
The other one replied back "Why're you talking like that man? Just talk normally like we usually do. There's no one here to impress except yours truly"
The first entity replied "One must always speak with pride and dignity while finishing one's foe........ Nah man this accent took a lot out of me. Well you're done for."
The first entity checkmated the second one and finally won.
The second entity said "I'm bored man, what do you want to do next? something fun and entertaining like those isekai stories we have been reading from earth 69.:
The first one replied " Well we should try reincarnating since we need to release our excess cosmic energy before we overload. It's been a while since we did anything too."
"Which world should we go to bro? we need a world where there's a lot of adventure as well as magic" said the second entity
"Pick a Number" said the first one
"99 i guess." answered the second one
"Congrats, we are going to world 99. The experimental world we created and left to rot after we started our chess match." said the first one
"WHATT!!! Why that world? We don't even know what happened to it. We only know that we divided the world evenly in half for humans and demons. Who knows, we might die in the first 5 seconds while we are an infant." said the second one
The first entity replied deviously "That's the fun part, if we die we die and if we survive we change for the better of worse. Let us play this game of ours and the last to survive wins."
The second entity replies " NOW THAT'S MORE LIKE IT. I'm fired up. May the best man win"
~System notification, two beings are being spiritually transferred to world no 99~
-To be continued