I Have a Manufacturing Space

Monsters and demons: "Our boss won't let you get away with this."

The protagonist: "Sorry, your boss is just one of the puppets I control."

The rich heir: "I've got money and influence. What can you possibly do to me?"

The protagonist: "There's always someone worse than you. What makes you think you can take on countless people who aren't afraid to die?"

The strongest one: "I'm invincible. I can do whatever I want."

The protagonist: "Go ahead and be strong. You'll find yourself fighting forever, until you drop from exhaustion."

This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.