Demons and Martial Arts

Late summer, A bus in Changbo City mysteriously hit a mountain wall and rolled over, falling into a valley. Ye Bai became the only person who survived. But after waking up, He discovered that the world seemed to be not right... "It seems that Aoyin has appeared in the city recently." "No, doesn't the Psychic Association care?" "Whatever, so this is news that just came, and citizens are asked to carry a psychic ball with them to protect themselves." Huh? What? Psychic? What is Aoyin? Ye Bai seems to have traveled to a world full of monsters.