I Kill Demons in the World

[Non-Harem + Time Travel + Pseudo-Keke] Cang Le traveled to a country called Daqian. In this world, in addition to ghosts and zombies, there are also strange dark creatures spawned by evil spirits, which people call demons. Compared to ghosts and zombies, demons are a more well-known existence. Daqian survived the dark age and finally came to the age of peace, and established many institutions to deal with these demons who were already in their terminal period. But, are humans hunters or prey?