Vampire x Human BL (pretty much the pre-serialization) in the author's backlog is twitter fluff of this couple. Should really be in the description. Not as good as the official version but if you're waiting for more chapters, there ya go.
This story is hecken cute and makes me cheer for Raul. There's sweetness and some violence, androgyny, and beefcake. Consistent understated sexy, without feeling like distracting fanservice. Despite the premise it's surprisingly non-toxic? Maybe questionable in the abstract, but Rose is doing alright and hasn't come off as pedo or grooming so far at all, rather his sweetness is consistent and he gently draws boundaries for his apprentice.
For my standards so far the story survives the minefield that ruins 95% of mentor/guardian->romance progression, doesn't do any of the machismo tropes that turns me off of a lot of BL, and I don't get a feeling of weird self-insert in the art or writing. It's not terribly thought provoking but it has a very nice balance.
I hope it runs a while.