Lu Yi transmigrated into a medieval fantasy world, but something went wrong: only his soul made the journey, turning him into an "evil spirit" who can only exist by relying on others.
To regain his body and freedom, he begins supporting various Hosts, hoping they'll help him get his body back someday.
From then on, he meets more and more people.
The genius mage Priscina sees him as her mentor and guide.
The Pope's Saintess and the Divine Palace's Saint General see him as the best partner they could ask for.
As the number of Hosts he supports grows, Lu Yi notices the people around him looking at him differently.
Then, on the day he regains his body, the girls who had always gotten along so well with him bare their fangs, strange pink hearts flickering in their eyes…
