Catching (Changing) Monsters in the City? !

This is how an ordinary student catches and transforms into a demon under the collision of different beliefs. How does a gift from a stranger, an ordinary bracelet, lead the male protagonist to a cheating life? At a time when beliefs are constantly colliding, what choice will the male protagonist make? Should he help humans kill demons, or? ?! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.