In a world where gates suddenly appeared, Espers were like a national power. South Korea's representative S-Class Esper, Cha Jaewoo, had a problem: after he gained his powers, he couldn't find a guide who had a high match rate with him.

Thus, it was mandated that all citizens must take the guide test.

"No way... I really hope this is not the case, but..."
"Haa..."
"...Is it Cha Jaewoo?"

Haeyool took the test, thinking he might as well get it over with, and he set a record of an unprecedented 97.8% match rate with Cha Jaewoo!

"So what? I'm a D-Class...!"

Cha Jaewoo was an S-Class Esper who had never received proper guiding before and was on the verge of exploding, while Haeyool was a pathetic D-Class Guide. Wouldn't even something like going after a boss monster as soon as you select your character be a better choice than that? Haeyool was about to refuse, having lost all energy at the thought that he might die, but...

"If a guide for Esper Cha Jaewoo doesn't appear, then he will be killed."
'...A-Are they insane?'

Just who was he worrying about, when he might die if he accepted? But after hearing that if he didn't become Cha Jaewoo's guide, the Esper would die, Haeyool swallowed his tears and signed the contract.

"Um... I already did today's amount this morning..."
"That's it?"
"That's the best I can do..."

Afterward, Haeyool lived in one house with Cha Jaewoo and a particle-sized amount of mana. He ended up guiding him once a day, but...