The hero is a pervert?! He's clearly a hero, but he's a complete idiot. He's clearly a hero, but he has no Demon King to fight against. He's clearly a human, but he never wears pants!

65 million years ago, Earth was ruled by all sorts of dinosaurs—from big to small. In the Quaternary Period of the Cenozoic Era, humans became the Earth's rulers. Unfortunately, a great deal of humans from their birth to death can only make use of 3