I Changed Classes to Grave Robber: Is It Really Too Much to Pry Open the Empress's Coffin?

[Global Class Change] + [Zombies] + [High Martial] + [Empress] + [Wild Imagination] + [System] In the age of Global Class Change, is an S-rank [Dragonblood War God] really that powerful? Is an A-rank ex-girlfriend really that practical? I'm Lin Han, an F-rank graduate of the [Funeral Management Department], awakened as an F-rank [Celestial Master Corpse Driver]. That's right. In everyone's eyes, I'm just a useless corpse collector. But they don't know I have the [Netherworld Nurturing] System. The SSS-rank Frost Empress: “Mortal, how dare you!” Lin Han: “Do you still want this month's yang-energy paycheck? If you do, go one-shot that dungeon Boss. And no overtime, your [Youth-Retaining Pill] is about to expire.” This is a laid-back story about an F-rank boss paying salaries, handing out pills, changing outfits, and teaching techniques to an SSS-rank empress and her undead army. Don't mess with me. I may be F-rank, but every one of my employees is SSS-rank!