Please don't obsess over the fake tranquilizer, Lord Black. (Associated Names)

The protagonist became a s*ave, facing annihilation due to the rampage of the strongest being in the world. “Why are you going on a rampage from the start!” In order to survive, they threw the protagonist at the human tranquilizer, ‘Guide’, who could calm him down. “Jade, you’re the Guide!” “Huh?” Why is everyone mistaking…