[Pseudo-Invincible Protagonist] [Rebirth] [Alternate Urban Setting] [One Female Lead]
[The System and Female Lead aren't important. If that bothers you, don't read.]
I once stood at the pinnacle of the universe.
The nine masters of the eras stood beside me, and all races prostrated themselves at my feet.
Then I was reborn.
I didn't do it. One of them sent me back to age seventeen, at the cost of disappearing.
Sending me back was one thing, but my memories were sealed, too.
And the most ridiculous part? Those nine old geezers were reborn along with me.
On the first day, they fought over the steering wheel in my head and nearly blew up Earth.
In the end, they reached an agreement: follow the rules, and nobody gets to cut in line.
So my daily life became...
Randomly blacking out.
Whenever I blacked out, it seemed like I'd done something insanely impressive.
But when I woke up, I couldn't remember a thing.
All I knew was that nine people lived in my head. Eight were there, and one spot was empty.
They wouldn't tell me about the empty spot.
I didn't ask.
Until one day, the empty spot spoke up on its own.
(Any resemblance is purely coincidental.)