I Slay Demons and Demons in the Great Zhou Dynasty

There are demons in the world who are extremely powerful and like to eat people. In order to eliminate the danger of demons, the imperial court of the Great Zhou Dynasty established local evil-suppressing departments and recruited demon-slayers to ensure peace. Yanagawa, who accidentally traveled to this world, woke up from the tomb with his eyes open. "So, my starting point is that I traveled back in time to a college boy who was buried alive by bullies?"