This world once had ghosts and humans coexisting. Werewolves, vampires, cult gods, and various witches are collectively referred to as "ghosts." Human beings are afraid of the innate supernatural power of the ghost tribe, and form a ghost-killing team equipped with silver weapons, exorcism runes, and holy light potions to launch a war of eradication. The war swept across the continent, and the ghost tribe was massacred.
The story takes place decades after the Purge War ended. Regret, Po Ling, Bad Mood, Ting and four ghosts go together. They wandered around, evading the pursuit of the ghost-killing team, and traveled through countless worlds: ancient times, strange rules, campuses... Just to find a place that could accommodate themselves. In the midst of their escape, they developed a bond between only four aliens.
Concept: Human nature is a symbiosis of good and evil, and light and darkness are never in opposition.