I Started as a Little Sparrow, and My Beast-Taming Powers Keep Growing

This sickly otherworldly continent is lifeless and bleak, because the flame of justice burns too faintly. Monsters roam everywhere: six-eyed monkeys that foresee the future and kill without a trace, fish demons that take human form, and butcher giants covered in tumors... On this chaotic land, humanity seems beyond saving. Yet just when everyone has lost hope, the arrival of a humorous young man brings it back. That day, with a book titled The Treatise on Miscellaneous Monster Ailments in his hands, the boy launches an exciting livestream of his monster hunts. He grumbles to his viewers, “I spend every day treating monsters. It's exhausting!”