Hyowha wow! Its really good! Gonna read more first before posting a proper review.
Is the way you use commas in chap 1 just your own style of speaking? I mean, in real life. The comma placements are strange!
But the story is so good that I can ignore that and just keep reading haha!
Another thing is; the introduction (first half of chap 1) can be shortened to 1/3 it's length? For example, maybe the applied facts vs. Circumstantial - you could stop after the gravity part and go straight to reincarnation.
Or switch out gravity for "once you for- you're dead. Sounds obvious right...?" Then something like. "So I died. But here I am".
Just suggestions how to make the start Quicker! Because if a reader is impatient, they'll stop reading and miss the incredibly good last few paragraphs!!