The Origin of the Sentinel-Guide Bond: The First Guide

[BL, bottom protagonist] [Interstellar] [Bonded artifacts/mental entities] [Evolvers/sentinel-guide] [corruption] [aberrant entities]

When Xia Qi opened his eyes, he found himself in a brand-new world: wondrous and mysterious, where the strong preyed on the weak and everything was valued above all else.

Ancient superstition? Ghosts and spirits?

No, neither. This was the new era: the year 339 of the Star River calendar!

A world of aberrant entities and Evolvers.

And he was the first Guide in this world!

Evolvers? They would become history, a thing of the past.

Sentinels and Guides were the future, the direction of the new era.

…

[The main couple are exclusive to each other. About the love interest: their identity changes in the early chapters; the one involved in the romantic tension is the right one.]

[Early setting: a prequel to Sentinel-Guide, set before they were even called Sentinels and Guides.]