Abyss

The world has been redefined by the sudden appearance of gates.
Countless beasts were unleashed, and countless awakeners were born.
Weapon Awakeners, who summon weapons, and Ability Awakeners, who use abilities. Depending on their strength, they range from D-rank to SS-rank.
Yoo Seo-Jin, an S-ranked Weapon Awakener, is offered a job at Abyss Management due to his outstanding skills and great personality.

“So what will I be doing?”
“There's only one thing I need you to do, and that's to stay here and not quit.”
“...?”

He's assigned to be the only team member to Koo Doha, one of only three superior awakeners which is more commonly known as SSS-rank.
His boss is all skill and no character!

“If I hadn't attacked, you'd have been killed!”
“I'd rather be killed!”
“Oh, yeah! I'm sorry I saved you, but unfortunately I'm a stupid S-class!”
“If you're sorry, write your resignation and resign! Write your resignation and get out!”

Work life is harder than raiding!