past obey me react to mc as vanitas & mammon as noé | 1/1

au: mammon leaves devildom before the human exchange program to go to the human world (in this au, noé is not a vampire, but a demon). so ‘mc’ is not the human exchange student.  none of the brothers know about mammon’s life in the human world, but they all miss him.  
this current timeline is set before diavolo even mentions the human exchange program (so belphie is not in the attic 💯)
also this is the canon timeline, not the nightbringer timeline. i think that was obvious but i’m just clarifying..