Here's a little intro of what these manga/webtoons are about...

Guideverse stories involve Espers & Guides in a fantasy/supernatural setting.
Espers ➼ superhumans with abilities (setback: when they use their powers, makes them sick with dark energy)
Guides ➼ the only people who can help espers with their setback
Important ➼ compability between esper & guide
Notice ➼ there are different twists on the guideverse trope per author.

Titles:
A Guide Thicker Than Blood
A Survival Guide for D-Class Guides
Although a Lone Wolf can Also Have Toriko's Love
B-Class Guide (B-Grade Guide)
Conditions of a Guide
Double Leash
Escape, Ray
Guiding Hazard
Guiding Light
Guilty Affection
How That Guide is Loved
Nameless
Ordinary Daily Life of an Omegaverse Guide
Ordinary Person A
Over The Paradise
Pride Goes Before a Fall
Profundis
Rapport
Revenge Guide
The Dark Night Journal
Until Morning Light
Zhong Qing

Any other titles? I just love these so trying to keep track of them.

I would check out the tag, if you haven't already: https://www.mangaupdates.com/series.html?category=Guideverse!

There doesn't seem to be a lot there yet though. ): There was someone else asking for recommendations before as well, so might be more suggestions there: https://www.mangaupdates.com/topic/2ptn1mw/request-for-more-bl-esper-guide-stories?page=1&hl=guideverse#post803908

http://i.imgur.com/LxhWm.jpg (will reformat this some day…)