My Night Shift Is in the Underworld

After he picked up the copper coin, little did he know that he had already signed a Yin-Yang debt. During the day, he was a struggling high school student; On the night of the full moon, he is a "traveler", wandering in the dark land where evil spirits parade, just to exchange for "ghost wages" and pay off debts. He originally thought this was just a two-world transaction of "exchanging money for names" Until he saw his familiar name in the ancient fragments Are all accidents arranged by fate? What secrets are hidden in the dark marks on the wrists...