The Omnipotent Life of a Man in His Late Twenties That Begins With a Level-Down Trap (WN)

Allen, who became an adventurer at the age of 12 and desperately worked hard to support his very young siblings, quit being an adventurer when they became independent and started working as an employee at the Adventurers’ Guild right when they were recruiting. However, his job was a humble one; managing the Slime Dungeon that adventurers did not care for. “Damn it, that Guildmaster. Always using us so hard. This is definitely the reason why my predecessor quit!” After a month of continuing to stomp slimes while feeling depressed, the dungeon suddenly underwent a change and the monsters and traps were completely changed. Allen investigated alone, but he stepped on a level-down trap in a h...