The title is It Says We Come from the Void.
If you're interested, go check it out lol.
It's also fanfiction-style infinite world-hopping, set in the same universe.
"Put nicely, not wanting them to repeat the same mistakes and changing their originally tragic endings is the first wish of every transmigrator."
"Put realistically, it's merely a transaction."
"And the price is only a little... everything."
Wu Xueyang calmly looked at the bizarre girl before him. Black, uncanny mist churned and surged within his deep, star-like eyes.
The Collector, a Primeval Eternal, alone for hundreds of millions of years.
One of the 126 surviving species in the Void, hailed as the first devils.
And the price was his ever-fading desires, emotions, and warmth.
Time wore away everything. Even immortals would eventually lose themselves in eternity.
When Truth came knocking, and mutterings and whispers completely consumed him, Wu Xueyang only wished to retain that one thing—his humanity.
(Anime, games, movies, and other worlds)