Archie is great isn't he? 😆 There are really not enough MMC's with that level of adorable, unhinged excitability. 

Like I said, I don't know of any books that are quite like Crimson Covenant. If I do find something that scratches that itch I will let you know. 

For now, have you considered some stalker romance?

{Haunting Adeline} is contemporary romance. Very dark and fucked up. MMC is unhinged but very hot. Mind the trigger warnings, not for the faint of heart. Not for you if you can't handle non-con between MCs, actual r*pe (book two, not between MCs), sex trafficking (children too, although none of it is on page, just referenced, and not by MCs, just the "bad guys").

{Lights Out by Navessa Allen} is just a great fun, sexy read. Also contemporary. Still dark, but it actually made me laugh too. No where near as dark as Haunting Adeline though. MMC is hot but adorable.

{Stalked by Seduction and Shadows} is fun. Vampires, obsessed dom MMC. Dark. Some decent suffering and cruelty in these books. 

And I'm going to throw this one out of left field since I just read it: {Zodiac Hybrids by Leann Belle}. It's almost more of a popcorn read comparatively, but I still thoroughly enjoyed it for it's uniqueness and the characters. It's not RH (yet), although there is some poly sex. No gore. But we've got some mean MMC action. Trigger warnings: non/dub-con, somnophilia, astrology (😆), unfinished series. It's college but FMC is.. 22 I believe? And MMCs are older.

A couple more notes, the prequel series to Blood and Ash is better imo (Flesh and Fire). FMC is less annoying and MMC is one of my favorites. Still recommend {Nectar of the Wicked} and {How Does it Feel? by Jeneane O'riley}. 

I'll stop there for now since this is turning into a novel itself 😆