To hinder the progress of the adventurer party, Nargor, a mid-level boss in the smallest dungeon, constructs an extensive labyrinth. However, to safeguard his cherished subordinates from the mightiest heroes who had vanquished the demon king, he confronts them and perishes. A century later, he reincarnates as a human in a deteriorating civilization. Now a boy endowed with the ability to summon and wielding numerous spells, he calls forth his former employees, who have since become legends. With the aim of rebuilding the demon king's forces, he restructures each dungeon.

Chuu Boss-san Level 99, Saikyou no Buka-tachi to Tomo ni Nishuume Totsunyuu!
Latest Release
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TCC-Reworks Chapter 11
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TCC-Reworks Chapter 10
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TCC-Reworks Chapter 9
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TCC-Reworks Chapter 8
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TCC-Reworks Chapter 7
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TCC-Reworks Chapter 6
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TCC-Reworks Chapter 5
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TCC-Reworks Chapter 4
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TCC-Reworks Chapter 3
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TCC-Reworks Chapter 2
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TCC-Reworks Chapter 1

I mean, the dungeon scenes are one thing, yeah it's cute and whatnot. I have no idea why readers for this manga would want to read about a kind demon boss - but cool, whatever.
The "fight" (if you can call it that) is absolutely nonsensical. It's a wall of contradictory exposition with a punch every 10 pages. Then the MC
Anyway, so the MC
Finally,
This author MUST be on drugs. I'm not even goddamn joking.