James is just a weird high school kid who thinks too much - but then the cutest girl in school asks him out. He winds up following her down a rabbit hole of sex, swinging, and increasingly complicated relationships. But mostly sex. Not that he minds. (Codes reflect current content - more to come later.)
Lily is your typical teenage girl: hates her mother, likes her friends, loves a guy who doesn't know who she is, etc. Oh, and she's also a fledgling succubus. But she doesn't know that yet.
Mark catches his sister red-handed (well, sort of), which leads to her giving him some quite unusual sisterly advice. (Written a while back under a different pen name, but still pretty good IMHO.)