It's accent gods of a religion which basically disappeared about 1000+ years ago. No need to feel guilty. Also the original myths were damn wild fanfictions. I remember the one about Osiris being split to pieces and Isis having to go through some trouble to get the guy his penis back. No kidding.
Im half way reading this manwha, and lemme tell you I feel like im sinning right now.. It feels blasphemous but it's so good.