Shave Your Head and Pass on the Ancient Sect

The newly promoted C-level agent of the Shengdao League appointed Li Yuan. During his first mission, he discovered that his old work-study classmate Li Yuan was suspected of being killed by a flying zombie. After taking down Li Yuan, he explained that he was contaminated with corpse energy because of something passed down from his ancestors. So Ren received a new task to protect Li Yuan, but unexpectedly discovered that he carried the inheritance of the ancient and strange sect - half-human, half-corpse. The drought demons that have been sleeping in the ancient dynasty to this day, the ghost gods from neon, the undead from the western continent... The mysterious ancient dead and all living humans in the modern era. Which side should the half-human and half-corpse Erahara choose?