After Ten Years of Study, I Finally Realized This Was a World of Demons

Zhou Yan transmigrated to a world where humans and demons lived side by side, becoming an ordinary citizen of the Great Han. He had hoped to pass the highest imperial exam and bring honor to his family, until one day a wailing cat and a mourning dog appeared on his roof. That's when he realized this was a world of demons! In that case, forget studying. I'm going to train in martial arts!