Story
The manga's story begins in a 60-year-old high-class apartment building, where a millionaire named Grant lives. One day, the apartment's doorman Howard reaches out to Grant, telling him that he wants to save Erica from the building's sixth floor from a cult. At first Grant will have none of it, until Howard reveals to Grant that he has knowledge of one of Grant's secrets.
Synopsis via AniList (English).
Preview
Promo video for this title.
