Shadow under the moon (Yaoi)

The following content is intended for mature audiences and may contain sexual themes, gore, violence and/or strong language. Discretion is advised.
A world where evil spirits exist.?Since childhood, “Jungwon” has lived with the ability to see various evil spirits. Although he has tried to ignore them, he gets caught up in a mission for the and loses his life.
He was sure he had died… so why is he still alive?

Through a pact with the black serpent “Sahyeon,” Jungwon has become immortal.?But is this contract a blessing, or a curse?