What a goddamn ending. Wow. It isn't often you see manga wrap up this nicely. The final conflict resolution was a teensy bit quick, but honestly who gives a shit. 10/10 for now, might make it a 9 after sitting on it, but for now it's a 10
Edit:
After sitting on it for a while, yeah it is a 9. The last conflict is wrapped up a little too quickly for my taste, and I wish there was more of a struggle. Maybe having the final fight be a few more chapters long could've increased the stakes, idk.
Also the main antagonist was kind of whatever for me. I just wish we got more time to expand on his character.
Still, that doesn't change the fact that this story is great. The concepts are super interesting, and the story goes into some really interesting directions. The whole past lives' influence thing was the biggest one for me. I've never seen a story with this kind of premise handle past lives in this cool of a way.
Point is, if the only real complaint someone has about your work is that there isn't more of it, then I'd say you did a pretty great job. Anyway, that's enough text walls from me for today.
Also unrelated, how to you add that spoiler button or whatever to something in your message?